General Purpose Fuses - Steven Engineering...General Purpose Fuses KLLU Class L Fuses 26-28...

w w w . l i t t e l f u s e . c o m© 2005 Littelfuse • POWR-GARD™ Products Catalog

General Purpose Fuses

KLLU Class L Fuses 26-28

FLNR_ID/FLSR_ID Indicator® Class RK5 Fuses 29-32

FLNR/FLSR Class RK5 Fuses 33

KLNR/KLSR Class RK1 Fuses 34-35

NLN/NLS Class K5 Fuses 36-37

RLN/RLS Class H Fuses 38

JLS Class J Fuses 39-40

JLLN/JLLS POWR-T ™ Class T Fuses 41-43

SLC Class G Fuses 44

Class CC and Class CD Fuses 45-47

Plug Fuses 48

Catalog 25-48.indd 25 5/30/07 6:18:47 PM

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

General Purpose FusesG

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26 w w w . l i t t e l f u s e . c o m © 2005 Littelfuse • POWR-GARD™ Products Catalog

KLLU series UL Listed, time-delay, Class L fus es are quality fuses, de vel oped to provide a some what lower priced al ter nate to the POWR-PRO® KLPC series fuses. KLLU series fuses meet or exceed all UL re quire ments for Class L fus es. For superior protection and performance, spec i fi ca tion-grade POWR-PRO KLPC series fus es are the rec om mend ed fuse. Com plete in for ma tion on KLPC fus es may be found in the POWR-PRO Fuse section of this catalog.

Applications

Service switchesSwitchboard mains and feedersBolted pressure contact switchesMotor control center mainsLarge motor branch circuitsUL Listed series rated protection for molded case circuit breaker

panelboards and loadcenters. See panelboard manufacturers’ literature for recommended fuse rating.

Safety

• 200,000 A.I.R. — Provides reliable in ter rup tion of all overcurrents up to 200,000 am peres.

• When used for motor branch circuit pro tec tion, KLLU fuses may be sized close to the motor full load current, providing excellent protection to branch circuit con duc tors, motor control equip ment and motors.

Longer Equipment Life

• Current-Limiting — Reduces short-circuit damage to systems and equipment.

• Reduced downtime.• Ten second minimum time-delay at 500% current eliminates

needless downtime caused by heavy starting currents of large motors and other in duc tive loads.

• Selective coordination — KLLU fuses co or di nate well with other Class L fuses and with all current-limiting Littelfuse fuses rated 600 amps or less. This means less time spent trying to locate short-circuits or over load ed equipment, because only the fuse im me di ate ly on the line side of the af fect ed circuit opens.

Easy To Use

• 200,000 A.I.R. rating minimizes need for short-circuit cal cu la tions, while meeting present and future system re quire ments.

• KLLU fuse time-current characteristics closely match typical time-current curves of circuit breakers. Although fuse/circuit breaker systems can seldom be 100% coordinated, KLLU series fuses permit use of a wider range of breaker setting than fast acting Class L fuses. Ex cel lent protection for a single breaker or a group of breakers.

KLLU Class L Fuses

600 VAC • Time-Delay • 601 – 4000 Amperes

Specifications

Voltage Ratings: AC: 600 Volts DC: Contact factoryInterrupting Ratings: 200,000 am peres rms symmetricalAmpere Range: 601 – 4000 amperesApprovals: Standard 248-10, Class L UL Listed (File No: E81895) CSA Certified (File No: LR29862)

Ampere Ratings

601 750 1000 1400 1800 3000650 800 1200 1500 2000 3500700 900 1350 1600 2500 4000

Example part number (series & amperage): KLLU 1000

Catalog 25-48.indd 26 5/30/07 6:18:52 PM




27w w w . l i t t e l f u s e . c o m© 2005 Littelfuse • POWR-GARD™ Products Catalog

KLLU Class L Fuses


BC

J

F

M

FIG.1

A ABC

J

D E F

N

M

FIG.2

D E FABC

G

H

NM

J

FIG. 3

NM G

D E FABC

HJ

FIG. 4

KL

Amperes Fig. No.Dimensions In Inches (mm in parentheses)

A B C D E F G H J K L M N

601 – 800 133⁄4

(95.3)53⁄4

(146.1)63⁄4

(171.5) — —8 5⁄8

(219.1) — —2

(50.8)21⁄2

(63.5)3⁄8

(9.5)5⁄8 x 11⁄8

(15.9) x (28.6)—

801 – 1200 233⁄4

(95.3)53⁄4

(146.1)63⁄4

(171.5)91⁄4

(235.0)91⁄2

(241.3)103⁄4

(273.1) — —2

(50.8)21⁄2

(63.5)3⁄8

(9.5)5⁄8 x 3⁄4

(15.9) x (19.1)5⁄8 x 11⁄8

(15.9) x (28.6)

1201 – 1600 233⁄4

(95.3)53⁄4

(146.1)63⁄4

(171.5)91⁄4

(235.0)91⁄2

(241.3)103⁄4

(273.1) — —23⁄8

(60.3)3

(76.2)7⁄16

(11.1)5⁄8 x 3⁄4

(15.9) x (19.1)5⁄8 x 11⁄8

(15.9) x (28.6)

1601 – 2000 233⁄4

(95.3)53⁄4

(146.1)63⁄4

(171.5)91⁄4

(235.0)91⁄2

(241.3)103⁄4

(273.1) — —23⁄4

(69.9)31⁄2

(88.9)1⁄2

(12.7)5⁄8 x 3⁄4

(15.9) x (19.1)5⁄8 x 11⁄8

(15.9) x (28.6)

2001 – 2500 3 453⁄4

(146.1)63⁄4

(171.5)91⁄4

(235.0)91⁄2

(241.3)103⁄4

(273.1)15⁄8

(41.3)13⁄4

(44.5)31⁄2

(88.9)5

(127.0)3⁄4

(19.1)5⁄8 x 3⁄4

(15.9) x (19.1)5⁄8 x 11⁄8

(15.9) x (28.6)

2501 – 3000 3 453⁄4

(146.1)63⁄4

(171.5)91⁄4

(235.0)91⁄2

(241.3)103⁄4

(273.1)15⁄8

(41.3)13⁄4

(44.5)4

(101.6)5

(127.0)3⁄4

(19.1)5⁄8 x 3⁄4

(15.9) x (19.1)5⁄8 x 11⁄8

(15.9) x (28.6)

3001 – 4000 4 453⁄4

(146.1)63⁄4

(171.5)91⁄4

(235.0)91⁄2

(241.3)103⁄4

(273.1)13⁄4

(44.5)31⁄4

(82.6)43⁄4

(120.7)53⁄4

(146.1)

3⁄4(19.1)

5⁄8 x 13⁄8(15.9) x (34.9)

5⁄8 x 13⁄8(15.9) x (34.9)

Catalog 25-48.indd 27 5/30/07 6:18:54 PM



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KLLU Class L Fuses


1000800600

400300

200

1008060

4030

20

1086

43

2

1.8.6

.4

.3

.2

.1.08.06

.04

.03

.02

.01

2000

3000

4000

6000

8000

1000

0

2000

0

3000

040

000

6000

080

000

1000

00

2000

00

3000

0040

0000

6000

0080

0000

1000

00080 100

200

300

400

600

800

100050

601A

800A

1200

A16

00A

2000

A30

00A

3500

A40

00A

TIM

E IN

SEC

ON

DS

CURRENT IN AMPERES SYMMETRICAL R.M.S. AMPERESAVAILABLE FAULT CURRENT

PEA

K LE

T-TH

RU IN

AM

PERE

S

800A1200A1600A2000A3000A4000A

10000000

1000000

100000

10000

1000

10

00

100

2000

00

1000

00

1000

0

Current-Limiting Effects of KLLU (600V) fuses

Short-Circuit Current*Apparent RMS Symmetrical Current for Various Fuse Ratings

800A 1200A 1600A 2000A 3000A 4000A

5,000 5,000 5,000 5,000 5,000 5,000 5,000

10,000 10,000 10,000 10,000 10,000 10,000 10,000

15,000 11,900 15,000 15,000 15,000 15,000 15,000

20,000 13,000 18,500 20,000 20,000 20,000 20,000

25,000 14,000 20,000 25,000 25,000 25,000 25,000

30,000 14,500 21,000 26,500 30,000 30,000 30,000

35,000 15,000 22,000 28,500 34,000 35,000 35,000

40,000 16,000 23,000 30,000 35,000 37,000 40,000

50,000 17,000 24,000 32,000 38,000 39,000 44,000

60,000 18,000 26,000 34,000 42,000 43,000 50,000

80,000 19,000 28,000 36,000 44,000 46,000 54,500

100,000 21,000 30,000 38,000 46,000 48,000 57,500

150,000 24,000 35,000 44,000 50,000 51,000 68,000

200,000 26,000 38,000 48,000 53,000 60,000 74,000

* Prospective RMS Symmetrical Amperes Short-Circuit CurrentNote: Data Derived from Peak Let-Thru Curves

Catalog 25-48.indd 28 5/30/07 6:18:55 PM





Littelfuse FLNR_ID/FLSR_ID Indicator fuses provide blown fuse indication at a glance. The patented state-of-the-art solid state design provides maximum reliability and superior performance characteristics in a true dual-element design. The use of Indicator fuses reduces downtime and nuisance openings, increases safety, and can save thousands of dollars in lost production time.

Applications

Service entrance switchesSwitchboard main and feeder switchesMotor control center mains and motor branch circuitsIndividual fused combination motor controllersDistribution panelboardsIndustrial control panelsProtection of fully rated panelboards and loadcentersAll general purpose circuits

Features/Benefits

• Reduce Downtime — A glance at the indicating window of a FLNR_ID or FLSR_ID Indicator fuse pinpoints open fuses. If the indicating strip is black, the fuse has opened. It’s that simple.

• Reduce Nuisance Opening — FLNR_ID and FLSR_ID Indicator fuses have superior time-delay and cycling characteristics which can lengthen fuse life and decrease needless opening.

• Reduce Fuse Inventory — Because FLNR_ID and FLSR_ID Indicator fuses have superior performance characteristics, they can be used on a variety of ap pli ca tions, thus decreasing fuse inventory.

• Reduce Equipment Damage — FLNR_ID and FLSR_ID Indicator fuses have superior overload and short-circuit protection which can reduce equipment damage.

• Reduce Accidents — The FLNR_ID and FLSR_ID Indicator fuses improve safety by minimizing exposure to live circuits. Unlike other forms of blown fuse indication, it doesn’t matter if the power is on or off. No second guessing whether a light means a fuse is good or bad, and no current going across a blown fuse to power a lighted accessory.

FLNR_ID/FLSR_ID Indicator® Class RK5 Fuses

250/600 VAC • Dual-Element, Time Delay • 1/10 – 600 Amperes

Specifications

Voltage Ratings: AC: 250 Volts (FLNR_ID); 600 Volts (FLSR_ID) DC: 125 Volts (FLNR 1⁄10 – 30A); 125 Volts (FLNR_ID 35 – 600A); 300 Volts (FLSR_ID)Interrupting Ratings: AC: 200,000 amperes rms symmetrical 300,000 amperes rms sym met ri cal (Littelfuse self-certified) DC: 20,000 amperesAmpere Range: 1⁄10 – 600 amperesApprovals: Standard 248-12, Class RK5 UL Listed (File No: E81895) CSA Certified (File No: LR29862) MSHA 300 Volt Listing (FLSR_ID) QPL: Federal Specification WF-1814

Ampere Ratings

1⁄10** 6⁄10 18⁄10 4 8 30 80 2251⁄8 8⁄10 2 41⁄2 9 35 90 250

15⁄100 1 21⁄4 5 10 40 100 3002⁄10 11⁄8 21⁄2 56⁄10 12 45 110 3501⁄4 11⁄4 28⁄10 6 15 50 125 400

3⁄10 14⁄10 3 61⁄4 171⁄2 60 150 4504⁄10 11⁄2 32 ⁄10 7 20 70 175 5001⁄2 16⁄10 31⁄2 71⁄2 25 75* 200 600

*FLSR_ID only **FLNR onlyEx am ple part number (series & am per age): FLSR100IDNOTE: For 1⁄10 – 30 ampere 250 volt fuses, order non-indicating FLNR series fuses.NOTE: All FLNR_ID fuses rated 35 – 600A are Indicator fuses.NOTE: All FLSR_ID fuses rated 1 amp and above are Indicator fuses.

Recommended Fuse Blocks

LR250 series (for FLNR_ID series fuses)LR600 series (for FLSR_ID series fuses)Refer to Blocks & Holders section of this catalog for ad di tion al in for ma tion.

Catalog 25-48.indd 29 5/30/07 6:18:56 PM



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TIM

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SEC

ON

DS

CURRENT IN AMPERES

FLSR_ID

.01

.02

.03

.04

.06

.08.1

.2

.3

.4

.6

.81

23468

10

2030406080

100

200300400600800

1000

10864321 1000080006000400030002000

1000800600400300200

1008060403020

1A 1.25

A1.

6A2A 2.

5A3A 4A 6A 10

A15

A20

A25

A30

A

1000800600

400300

200

1008060

403020

1086

43

2

1.8.6

.4

.3

.2

.1.08.06

.04

.03

.02

.01

2 3 4 6 8 10 20 30 40 60 80 100

200

300

400

600

800

1000.1 .2 .3 .4 .6 .8 1

2/10

A1/

4A3/

10A

4/10

A1/

2A6/

10A

8/10

A1A 1

1/4A

1 4/

10A

2A 2 1/

2A4

1/2A

5A 7A 7 1/

2A9A

FLNR

TIM

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SEC

ON

DS

CURRENT IN AMPERES

AF

EC

DG B

A

J

K

H

B

C

F D G

70-600AFIG. 1 FIG. 2

E

Amperes Refer ToFig. No. SeriesDimensions In Inches (mm in parentheses)

A B C D E F G H J K

1/10 – 30 1FLNR 2 (50.8) 1⁄2 (12.7) 1⁄2 (12.7) 9⁄16 (14.3) 5⁄64 (2.0) 5⁄32 (4.0) 3⁄8 (9.5) — — —

FLSR_ID 5 (127.0) 3⁄4 (19.1) 5⁄8 (15.9) 13⁄16 (20.6) 3⁄32 (2.4) 3⁄16 (4.8) 5⁄8 (15.9) — — —

35 – 60 1FLNR_ID 3 (76.2) 3⁄4 (19.1) 5⁄8 (15.9) 13⁄16 (20.6) 3⁄32 (2.4) 3⁄16 (4.8) 5⁄8 (15.9) — — —

FLSR_ID 51⁄2 (139.7) 1 (25.4) 5⁄8 (15.9) 11⁄16 (27.0) 3⁄32 (2.4) 1⁄4 (6.4) 7⁄8 (22.2) — — —

70 – 100 2FLNR_ID 57⁄8 (149.2) 1 (25.4) 11⁄16 (27.0) 11⁄16 (27.0) 1⁄8 (3.2) 3⁄4 (19.1) 11⁄4 (31.8) 1⁄4 (6.4) 9⁄32 (7.1) 1⁄2 (12.7)

FLSR_ID 77⁄8 (200.0) 11⁄4 (31.8) 11⁄16 (27.0) 15⁄16 (33.3) 1⁄8 (3.2) 3⁄4 (19.1) 11⁄2 (38.1) 1⁄4 (6.4) 9⁄32 (7.1) 1⁄2 (12.7)

110 – 200 2FLNR_ID 71⁄8 (181.0) 11⁄2 (38.1) 115⁄32 (37.3) 119⁄32 (40.5) 3⁄16 (4.8) 11⁄8 (28.6) 127⁄32 (46.8) 7⁄16 (11.1) 9⁄32 (7.1) 11⁄16 (17.5)

FLSR_ID 9 5⁄8 (244.5) 13⁄4 (44.5) 115⁄32 (37.3) 127⁄32 (46.8) 3⁄16 (4.8) 11⁄8 (28.6) 23⁄32 (53.2) 7⁄16 (11.1) 9⁄32 (7.1) 11⁄16 (17.5)

225 – 400 2FLNR_ID 85⁄8 (219.1) 2 (50.8) 115⁄16 (49.2) 23⁄32 (53.2) 1⁄4 (6.4) 15⁄8 (41.3) 211⁄32 (59.5) 5⁄8 (15.9) 13⁄32 (10.3) 15⁄16 (23.8)

FLSR_ID 115⁄8 (295.3) 21⁄2 (63.5) 2 (50.8) 219⁄32 (65.9) 1⁄4 (6.4) 15⁄8 (41.3) 227⁄32 (72.2) 5⁄8 (15.9) 13⁄32 (10.3) 15⁄16 (23.8)

450 – 600 2FLNR_ID 103⁄8 (263.5) 21⁄2 (63.5) 2 3⁄8 (60.3) 219⁄32 (65.9) 1⁄4 (6.4) 2 (50.8) 227⁄32 (72.2) 3⁄4 (19.1) 17⁄32 (13.5) 11⁄8 (28.6)

FLSR_ID 133⁄8 (339.7) 3 (76.2) 213⁄32 (61.1) 33⁄32 (78.6) 1⁄4 (6.4) 2 (50.8) 311⁄32 (84.9) 3⁄4 (19.1) 17⁄32 (13.5) 11⁄8 (28.6)

For additional application information request Product Bulletin EL-4

Catalog 25-48.indd 30 5/30/07 6:19:03 PM





Current-Limiting Effects of FLNR_ID (250V) fuses


30A 60A 100A 200A 400A 600A

5,000 1,400 2,100 3,100 5,000 5,000 5,000

10,000 1,550 2,500 3,900 6,500 9,500 10,000

15,000 2,000 3,150 4,400 7,250 10,500 14,000

20,000 2,250 3,400 5,000 8,250 12,000 16,000

25,000 2,400 3,750 5,250 9,000 12,500 16,500

30,000 2,550 4,100 5,600 9,500 13,500 18,000

35,000 2,650 4,300 5,800 9,750 14,000 19,000

40,000 2,800 4,400 6,250 10,250 15,000 20,000

50,000 3,000 5,000 6,500 10,500 16,000 21,000

60,000 3,200 5,250 7,000 11,500 17,000 23,000

80,000 3,400 5,750 7,500 12,500 19,000 25,500

100,000 3,850 6,000 8,000 13,500 21,000 27,500

150,000 4,100 7,000 9,000 15,200 24,000 31,500

200,000 4,300 7,500 9,750 16,500 26,000 34,000


Current-Limiting Effects of FLSR_ID (600V) fuses


30A 60A 100A 200A 400A 600A

5,000 1,250 2,100 3,200 5,000 5,000 5,000

10,000 1,600 2,850 4,300 7,250 10,000 10,000

15,000 1,800 3,400 5,000 8,500 13,500 15,000

20,000 2,250 3,800 5,500 9,500 15,750 19,000

25,000 2,450 4,100 5,700 10,250 17,000 21,000

30,000 2,700 4,500 6,400 10,750 18,000 23,000

35,000 2,900 4,800 6,700 11,500 19,000 24,250

40,000 3,000 5,000 7,250 12,000 19,500 27,000

50,000 3,400 5,250 7,750 13,000 21,000 29,000

60,000 3,600 5,750 8,100 14,000 22,000 30,500

80,000 3,900 6,250 9,000 15,000 24,000 33,000

100,000 4,300 6,750 9,750 16,500 26,000 35,000

150,000 4,500 7,600 11,100 19,000 28,000 38,000

200,000 4,600 8,400 12,250 21,500 30,000 40,000




Catalog 25-48.indd 31 5/30/07 6:19:05 PM



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600A400A200A100A60A30A15A

5 10080604030201086 10000080000

60000

40000

30000

20000

100008000

6000

4000

3000

2000

1000800

600

400

300

200

.01

.02

.03

.04

.05

.06

.08.1

.2

.3

.4

.6

.81

2

3

4

6

810

20

30

40

60

80100

200

300

400

600

8001000

CURRENT IN AMPERES

TIM

E IN

SEC

ON

DS

FLSR_ID600A400A200A100A60A

50 1000800

600

400

300

200

1008060 1000000800000

600000

400000

300000

200000

10000080000

60000

40000

30000

20000

100008000

6000

4000

3000

2000

.01

.02

.03

.04

.06

.08.1

.2

.3

.4

.6

.81

2

3

4

6

810

20

30

40

60

80100

200

300

400

600

8001000

TIM

E IN

SEC

ON

DS

CURRENT IN AMPERES

FLNR_ID

60A

100A

200A

400A

600A

1000000

800000

600000

400000

300000

200000

100000

80000

60000

40000

30000

20000

10000

8000

6000

4000

3000

2000

1000

800

600

400

300

200

100 1000

800

600

400

300

200

100

200000

100000

80000

60000

40000

30000

20000

10000

8000

6000

4000

3000

2000

FLNR_ID

PEA

K L

ET -

THRU

IN

AM

PERE

S

AVAILABLE FAULT CURRENTSYMMETRICAL R.M.S. AMPERES

600A

400A

200A

100A

60A

30A

15A

1000000

800000

600000

400000

300000

200000

100000

80000

6000050000

40000

30000

20000

10000

8000

60005000

4000

3000

2000

1000

800

600

400

300

200

100 1000

800

600

400

300

200

100

200000

100000

80000

60000

40000

30000

20000

10000

8000

6000

4000

3000

2000

PEA

K L

ET -

THRU

IN

AM

PERE

S

AVAILABLE FAULT CURRENTSYMMETRICAL R. M. S. AMPERES

FLSR_ID

Catalog 25-48.indd 32 5/30/07 6:19:06 PM





Littelfuse FLNR/FLSR series fuses have been the superior UL Class RK5 dual-element time-delay fuses, and are the most widely used class of fuses. FLNR/FLSR series fuses provide excellent protection for all types of circuits especially those containing motors. However, users and specifiers should consider the significant benefits offered by Indicator fuses. Complete information on these fuses may be found earlier in this section.

Applications

Service entrance switchesSwitchboard main and feeder switchesMotor control center mains and motor branch circuitsIndividual fused combination motor controllersDistribution panelboardsIndustrial control panelsProtection of fully rated panelboards and loadcentersAll general purpose circuits

Safety

• 200,000 A.I.R. — Reliable interruption of all overcurrents up to 200,000 amperes.

• Faster acting short-circuit protection than any non-current-limiting mechanical protective device.

Reliability

• Accurate and reliable — Automated, precision manufactured and assembled parts ensure accurate, consistent response to overloads and short-circuits.


• Reduced damage to equipment caused by heating and magnetic forces of short-circuits.

• Equipment runs cooler with low-resistance dual-element fuses.

FLNR/FLSR Class RK5 Fuses

250/600 VAC • Dual-Element, Time-Delay • 1/10 – 600 Amperes

Specifications

Voltage Ratings: AC: 250 Volts (FLNR) 600 Volts (FLSR) DC: 125 Volts (FLNR) 300 Volts (FLSR)Interrupting Ratings: AC: 200,000 amperes rms symmetrical DC: 20,000 amperesAmpere Range: 1⁄10 – 600 amperesApprovals: Standard 248-12, Class RK5 UL Listed (File No: E81895) CSA Certified (File No: LR29862) MSHA 300 Volt Listing (FLSR) QPL: Federal Specification WF-1814

Dimensions

Refer to FLNR_ID series for FLNR dimensions and FLSR_ID series for FLSR dimensions.

Ampere Ratings

1⁄10 6⁄10 18⁄10 4 8 30 80 2251⁄8 8⁄10 2 41⁄2 9 35 90 250

15⁄100 1 21⁄4 5 10 40 100 3002⁄10 11⁄8 21⁄2 56⁄10 12 45 110 3501⁄4 11⁄4 28⁄10 6 15 50 125 400

3⁄10** 14⁄10 3 61⁄4 171⁄2 60 150 4504⁄10 11⁄2 32 ⁄10 7 20 70 175 5001⁄2 16⁄10 31⁄2 71⁄2 25 75 200 600

**FLNR only, Ex am ple part number (series & am per age): FLSR100


LR250 series (for FLNR series fuses)LR600 series (for FLSR series fuses)Refer to Blocks & Holders section of this catalog for ad di tion al in for ma tion.

Catalog 25-48.indd 33 5/30/07 6:19:07 PM



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KLNR/KLSR Class RK1 Fuses

250/600 VAC • Fast Acting • 1 – 600 Amperes

SpecificationsVoltage Ratings: AC: 250 Volts (KLNR); 600 Volts (KLSR) DC: 125 Volts (1 – 600A KLNR); 250 Volts (1 – 30A KLSR); 300 Volts (35 – 600A KLSR). In ter rupt ing Ratings: AC: 200,000 amperes rms sym met ri cal DC: 20,000 amperesAmpere Range: 1 – 600 amperes.Approvals: AC: Standard 248-12, Class RK1 UL Listed (File No: E81895) CSA Certified (File No: LR29862) DC: Littelfuse self-certified

Ampere Ratings1 10 40 100 2502 12 45 110 3003 15 50 125 3504 20 60 150 4005 25 70 175 4506 30 80 200 5008 35 90 225 600

Example part number (series & amperage): KLNR 200

Recommended Fuse BlocksLR250 series (for KLNR series fuses)LR600 series (for KLSR series fuses)Refer to the Blocks & Holders section of this catalog for additional in for ma tion.

KLNR/KLSR series RK1 fuses were the earliest type of current-limiting fuses developed. Their single-element, silver link design enables them to provide fast-acting overload and short-circuit pro tec tion. When used to protect inductive loads such as motors, solenoids, and trans form ers, KLNR/KLSR series fuses must be greatly oversized to prevent opening the fuses on harmless in-rush currents. In such applications, KLNR/KLSR series fuses may only provide short-circuit pro tec tion.

We recommend using POWR-PRO® LLNRK/LLSRK series Class RK1, dual-element, time-de lay fuses in all new applications re quir ing the current-limiting ability of UL Class RK1 fuses. POWR-PRO LLNRK/LLSRK series fuses are also recommended in existing applications where fast-acting RK1 or RK5 fuses have been open ing on harmless system surges such as motor start ing currents.

ApplicationsResistance heatersLighting circuitsNon-inductive loadsMolded case circuit breaker load centers and panelboards have

increased in ter rupt ing ratings when series rated with Littelfuse KLNR/KLSR Class RK1 fuses. Refer to panelboard manufacturer’s literature for UL Listed com bi na tion of fuses and panelboards. Series ratings up to 200,000 amperes are available.

Safety• 200,000 A.I.R. — Reliable interruption of all overcurrents up to

200,000 amperes.• Extremely current-limiting — Stops dam ag ing short-circuit current

faster than any mechanical pro tec tive device.• Fast-acting — Provides fast acting protection to equipment such

as variable speed drives, rectifiers and other equip ment containing surge-sensitive com po nents.

Longer Equipment Life• Current-limiting design reduces damage to equip ment caused by

heating and magnetic effects of short-circuit currents.

Economical• Extremely current-limiting — often permits use of readily available,

less costly equipment.• Used as input or output fuses for surge sensitive com po nents such

as variable speed drives and rectifiers, fast acting KLNR/KLSR fuses may prevent opening of ex pen sive semiconductor fuses protecting individual components.

Easy To Use• 200,000 A.I.R. rating min i miz es need for short-circuit calculations.

Dimensions• Refer to FLNR_ID for KLNR dimensions and FLSR_ID for KLSR

dimensions.

Catalog 25-48.indd 34 5/30/07 6:19:10 PM





KLNR/KLSR Class RK1 Fuses


1000800600

400300

200

1008060

4030

20

1086

43

2

1.8.6

.4

.3

.2

.1.08.06

.04

.03

.02

.01

200

300

400

600

800

1000

2000

3000

4000

6000

8000

1000

0

2000

0

3000

040

000

6000

080

000

1000

0010 20 30 40 60 80 100

30A

60A

100A

200A

400A

600A

TIM

E IN

SEC

ON

DS

CURRENT IN AMPERES

1000800600

400300

200

1008060

4030

20

1086

43

2

1.8.6

.4

.3

.2

.1.08.06

.04

.03

.02

.01

200

300

400

600

800

1000

2000

3000

4000

6000

8000

1000

0

2000

0

3000

040

000

6000

080

000

1000

0010 20 30 40 60 80 1005

30A

60A

100A

200A

400A

600A

TIM

E IN

SEC

ON

DS

CURRENT IN AMPERES

2000

3000

4000

6000

8000

1000

0

2000

0

3000

040

000

6000

080

000

1000

00

2000

00100

200

300

400

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800

1000

100

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300400

600800

1000

2000

30004000

60008000

10000

20000

3000040000

6000080000

100000

200000

300000400000

600000800000

1000000

600A400A

200A

100A60A

30A

PEA

K LE

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AM

PERE

S


2000

3000

4000

6000

8000

1000

0

2000

0

3000

040

000

6000

080

000

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00

2000

00100

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100

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300400

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30A

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KLSRKLNR

KLSRKLNR

Catalog 25-48.indd 35 5/30/07 6:19:13 PM



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NLN/NLS Class K5 Fuses

250/600 VAC • “One-Time” • 1 – 600 Amperes

NLN and NLS series fuses provide low cost protection for general purpose feeder and branch circuits when avail able short-circuit currents are less than 50,000 amperes. They replace all Class H fuses which have only a 10,000 ampere interrupting rating. They are suitable for use in many res i-den tial and smaller commercial and industrial applications.

NLKP series fuses are Canadian “Code” fuses specifically de signed to meet Canadian Electrical Code Type P fuse re quire ments for residential use. They have a 10,000 ampere interrupting rating.

However, to obtain the added benefits of time-delay, cur rent-limitation, and higher interrupting rating, consider the use of POWR-PRO® FLNR_ID and FLSR_ID Indicator® fuses for circuits up to 600 volts. The user gets all the benefits of time-delay RK5 fuses plus the added benefits of an indicating fuse that shows when it has opened. Complete information on these fuses may be found in the POWR-PRO fuse section of this catalog. For circuits up to 250 volts, see FLNR fuses in this section of the catalog.

Applications

General purpose residential and commercial circuits with little or no motor load.

Resistive heating loads.

Economical

• For use in applications where lowest initial cost is the major consideration.

Safety

• 50,000 A.I.R., Class K5 — Adequate in ter rupt ing capacity for residences and many smaller facilities.

NOTE: NLKP series fuses have limited interrupting rating and should be used only where available short-circuit current is known to be less than the fuse interrupting rating. Where available fault current is unknown, where it exceeds NLN/NLS interrupting rating, or where it may increase in the future, 200,000 ampere interrupting rating Littelfuse POWR-PRO FLNR_ID/FLSR_ID Indicator fuses and FLNR/FLSR series fuses provide superior pro tec tion for all motor and general purpose circuits con tain ing inductive loads.

SpecificationsVoltage Ratings: AC: 250 Volts (NLN, NLKP) 600 Volts (NLS) DC: 250 Volts (NLN) 400 Volts (NLS 35 – 60A) 500 Volts (NLS 8 – 30A) (NLS 225 – 600A) 600 Volts (NLS 1 – 7A) (NLS 70 – 200A)Interrupting Ratings: AC: 50,000 amperes rms sym met ri cal (NLN/NLS) 10,000 amperes (NLKP) DC: 20,000 amperes (NLN/NLS 1 – 60A) 50,000 amperes (NLN/NLS 70 – 600A)Ampere Range: 1– 600 amperes (NLN/NLS) 15 – 60 amperes (NLKP)Ap prov als: NLN/NLS: Standard 248-9, Class K5 UL Listed (File No: E81895) CSA Certified (File No: LR29862)** **Excludes NLN 15-60A NLKP: Standard 248-6, Class H UL Listed (File No: E81895) CSA Certified (File No: LR29865) Meets CSA “Type P” requirements

Ampere Ratings

1 7 *25 *60 125 3002 8 *30 70 150 3503 10 *35 80 175 4004 12 *40 90 200 4505 *15 *45 100 225 5006 *20 *50 110 250 600

* NLKP series avail able only in those amperages preceded by an asterisk.Example part number (series & amperage): NLS 125


LH250 series (for NLN and NLKP series fuses)LH600 series (for NLS series fuses)Refer to the Blocks & Holders section of this catalog for additional in for ma tion.

Catalog 25-48.indd 36 5/30/07 6:19:13 PM





NLN/NLS Class K5 Fuses

250/600 VAC • “One-Time” • 1 – 600 Amperes

CURRENT IN AMPERES

TIM

E IN

SEC

ON

DS

NLS60

0A

.01

.02

.03

.04

.05

.06

.08.1

.2

.3

.4

.6

.81

2

3

4

6

810

20

30

40

60

80100

200

300

400

600

8001000

5 10080604030201086 10000080000

60000

40000

30000

20000

100008000

6000

4000

3000

2000

1000800

600

400

300

200

400A

200A

100A

60A

30A

25A

20A

15A

TIM

E IN

SEC

ON

DS

CURRENT IN AMPERES

NLN

.01

.02

.03

.04

.06

.08.1

.2

.3

.4

.6

.81

2

3

4

6

810

20

30

40

60

80100

200

300

400

600

8001000

5 10080604030201086 10000080000

60000

40000

30000

20000

100008000

6000

4000

3000

2000

1000800

600

400

300

200

200A

100A

400A

600A

60A

30A

25A

20A

15A

A

C CDA E

BB F D G

FIG. 1 FIG. 2

Amperes Refer toFig. No. SeriesDimensions In Inches (mm in parentheses)

A B C D E F G

1 – 30 1NLNNLKP 2 (50.8)

1⁄2 (12.7) 1⁄2 (12.7) 9⁄16 (14.3) — — —

NLS 5 (127.0) 3⁄4 (19.1) 5⁄8 (15.9) 13⁄16 (20.6) — — —

35 – 60 1NLNNLKP 3 (76.2)

3⁄4 (19.1) 5⁄8 (15.9) 13⁄16 (20.6) — — —

NLS 51⁄2 (139.7) 1 (25.4) 5⁄8 (15.9) 11⁄16 (27.0) — — —

70 – 100 2NLN 57⁄8 (149.2) 1 (25.4) 1 (25.4) 11⁄16 (27.0) 1⁄8 (3.2) 3⁄4 (19.1) 15⁄16 (33.3)

NLS 77⁄8 (200.0) 11⁄4 (31.8) 1 (25.4) 15⁄16 (33.3) 1⁄8 (3.2) 3⁄4 (19.1) 19⁄16 (39.7)

110 – 200 2NLN 71⁄8 (181.0) 11⁄2 (38.1) 13⁄8 (34.9) 19⁄16 (39.7) 3⁄16 (4.8) 11⁄8 (28.6) 17⁄8 (47.6)

NLS 9 5⁄8 (244.5) 13⁄4 (44.5) 13⁄8 (34.9) 127⁄32 (46.8) 3⁄16 (4.8) 11⁄8 (28.6) 23⁄32 (53.2)

225 – 400 2NLN 8 5⁄8 (219.1) 2 (50.8) 17⁄8 (47.6) 23⁄32 (53.2) 1⁄4 (6.4) 15⁄8 (41.3) 213⁄32 (61.1)

NLS 115⁄8 (295.3) 21⁄2 (63.5) 17⁄8 (47.6) 219⁄32 (65.9) 1⁄4 (6.4) 15⁄8 (41.3) 27⁄8 (73.0)

450 – 600 2NLN 10 3⁄8 (263.5) 21⁄2 (63.5) 21⁄4 (57.2) 219⁄32 (65.9) 1⁄4 (6.4) 2 (50.8) 27⁄8 (73.0)

NLS 13 3⁄8 (339.7) 3 (76.2) 21⁄4 (57.2) 33⁄32 (78.6) 1⁄4 (6.4) 2 (50.8) 37⁄16 (87.3)

Catalog 25-48.indd 37 5/30/07 6:19:16 PM



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RLN/RLS Class H Fuses

250/600 VAC • Renewable • 1 – 600 Amperes

Littelfuse RLN/RLS series renewable fuses are a quality product that have traditionally been used to provide low cost protection of general purpose feeder and branch circuits where available short-circuit currents do not exceed 10,000 amperes. However, increased levels of available fault current and the possibility that renewable fuses may be im prop erly renewed is a potential safety hazard. In addition, escalating labor costs

and increasing automation, which makes down time very expensive, have greatly re duced or eliminated the cost savings attributed to renewable fuses.

We recommend the use of POWR-PRO® FLSR_ID series Indicator® fuses for circuits between 250 and 600 volts and FLNR_ID series for circuits 250 volts and below. Complete information on POWR-PRO

Indicator fuses may be found in the POWR-PRO fuse section of this catalog. FLNR fuses are in this section of the catalog.

Cost Considerations

• When comparing the cost of using re new able fuses with the cost of other fuses, the labor required for replacing links and the cost of ad di-tion al downtime should be included.

Cautions

• Renewable fuses should only be used where short-circuit currents are known to be less than 10,000 amperes, and where correct replacement of open links is assured.

• After disassembly of fuse, examine carefully. Discard any fuses which show evidence of weak ened tube or damaged components.

• Remove all link residue from fuse tube.• Carefully clean all contact surfaces, and remove metal spatter from

all surfaces.• Install the proper rated fuse link and tighten all con nec tions

securely.• Vi su al ly ex am ine fuses for cor rect align ment of blades.

Dimensions

• For dimensions, please refer to NLN series for RLN di men sions and NLS series for RLS dimensions.

Specifications

Voltage Ratings: AC: 250 Volts (RLN); 600 Volts (RLS)In ter rupt ing Ratings: AC: 10,000 am peres rms sym met ri calAmpere Range: 1 – 600 amperesAp prov als: Standard 248-6, Class H UL Listed (File No: E81895) CSA Certified (File No: LR29862)FUSE LINKS: To order, specify LKN (250V) or LKS (600V) plus ampere rating.

Ampere Ratings

1 6 20 45 90 175 350*2 8** 25 50 100 200 400*3 10 30 60 110 225* 450*4 12** 35 70 125 250* 500*5 15 40 80 150 300* 600*

*These ampere ratings require two links per fuse.**RLS Only.

Example part number (series & amperage): RLN 20


LH250 series (for RLN series fuses)LH600 series (for RLS series fuses)Refer to the Blocks & Holders section of this catalog for additional in for ma tion.

Catalog 25-48.indd 38 5/30/07 6:19:18 PM





JLS Class J Fuses

600 VAC • Fast Acting • 1 – 600 Amperes

Specifications

Voltage Ratings: 600 Volts ACInterrupting Ratings: 200,000 amperes rms symmetricalAmpere Range: 1 – 600 amperesApprovals: Standard 248-8, Class J UL Listed (File No: E81895) CSA Certified (File No: LR29862) QPL: Federal Specification No: WF-1814

Ampere Ratings

1 25 60 125 3003 30 70 150 3506 35 80 175 40010 40 90 200 45015 45 100 225 50020 50 110 250 600

Example part number (series & amperage): JLS 110


LPSJ series, LJ600 series Refer to the Blocks and Holders section of this catalog for additional in for ma tion.

JLS series fuses provide space saving, fast acting overload and short-circuit protection for non-inductive loads. When used for motors or other inductive loads, the ampere rating of JLS series fuses must be increased to prevent nuisance opening on in-rush currents. In such applications, JLS fuses may provide only short-circuit protection. Con sid er using Littelfuse POWR-PRO® JTD or JTD_ID series time-delay fuses in such circuits.

Applications

General purpose circuits with little or no motor load.Resistive loads, such as resistance electric heat.Loads requiring fast acting overload protection, such as equipment

containing solid-state devices.

Space Saving

• JLS fuse characteristics are similar to KLNR/KLSR fast acting Class RK1 fuses, but dimensionally are much smaller.

Safety


• Extremely current-limiting — Stops dam ag ing short-circuit current faster than any mechanical pro tec tive device.

• Fast acting — Provides fast acting protection to equipment such as variable speed drives, rectifiers and other equip ment containing surge sensitive com po nents.


• Current-limiting design reduces damage to equip ment caused by heating and magnetic effects of short-circuit currents.

Economical

• Extremely current-limiting design often permits use of readily available, less costly equipment.

• Manufacturers of equipment containing dual voltage devices can simplify manufacturing and reduce inventory by stan dard iz ing on 600 volt JLS fuses and Class J fuse blocks for all AC voltage ratings.

Easy to use

• 200,000 A.I.R. rating minimizes need for short-circuit cal cu la tions.

NOTE: Littelfuse JLS fuses are not time-delay fuses. For ap pli ca tions where short-duration surg es and spikes may cause nuisance fuse opening, consider the use of Littelfuse POWR-PRO JTD or JTD_ID series time-delay fuses.

Catalog 25-48.indd 39 5/30/07 6:19:20 PM



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JLS Class J Fuses

600 VAC • Fast Acting • 1 — 600 Amperes

1000800600

400300

200

1008060

4030

20

1086

43

2

1.8.6

.4

.3

.2

.1.08.06

.04

.03

.02

.01

200

300

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1000

0

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0

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040

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000

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008 10 20 30 40 60 80 1005

30A

60A

100A

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600A

TIM

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DS

CURRENT IN AMPERES

A

C

DG F

EHA

BCD

Fig. 1 Fig. 2

2000

3000

4000

6000

8000

1000

0

2000

0

3000

040

000

6000

080

000

1000

00

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00100

200

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1000

2000

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3000040000

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200000

300000400000

600000800000

1000000

600A

400A

200A

100A60A

30A

PEA

K LE

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Amperes Refer to Fig. No.

Dimensions In Inches (mm in parentheses)

A B C D E F G H

1 – 30 1 21⁄4 (57.2) — 1⁄2 (12.7) 13⁄16 (20.6) — — — —

35 – 60 1 23⁄8 (60.3) — 5⁄8 (15.9) 11⁄16 (27.0) — — — —

70 – 100 2 25⁄8 (66.7) 317⁄32 (89.7) 323⁄32 (94.5) 45⁄8 (117.5) 1 (25.4) 3⁄4 (19.1) 9⁄32 (7.1) 1⁄8 (3.2)

110 – 200 2 3 (76.2) 49⁄32 (108.7) 415⁄32 (113.5) 5 3⁄4 (146.1) 11⁄2 (38.1) 11⁄8 (28.6) 9⁄32 (7.1) 3⁄16 (4.8)

225 – 400 2 33⁄8 (85.7) 51⁄8 (130.2) 53⁄8 (136.5) 71⁄8 (181.0) 2 (50.8) 15⁄8 (41.3) 13⁄32 (10.3) 1⁄4 (6.4)

450 – 600 2 33⁄4 (95.3) 527⁄32 (148.4) 65⁄32 (156.4) 8 (203.2) 21⁄2 (63.5) 2 (50.8) 17⁄32 (13.5) 3⁄8 (9.5)

Catalog 25-48.indd 40 5/30/07 6:19:22 PM





JLLN/JLLS POWR-T™ Class T Fuses

300/600 VAC • Fast-Acting • 1 – 1200 Amperes

Specifications

Voltage Ratings: AC: 300 Volts (JLLN); 600 Volts (JLLS) DC: 125 Volts (JLLN 1 – 30A) 160 Volts (JLLN 35 – 60A) 125 Volts (JLLN 110 – 1200A) 300 Volts (JLLS)Interrupting Ratings: AC: 200,000 amperes rms symmetrical DC: 20,000 amperes (JLLN 110 – 1200A) (JLLS 1 – 1200A)Ampere Range: 1– 1200 amperesApprovals: AC: Standard 248-15, Class T UL Listed (File No: E81895): JLLN/JLLS (1 – 800A) UL Recognized (File No: E71611): JLLS (900 – 1200A) CSA Certified (File No: LR29862): JLLN/JLLS (1 – 600A) DC: UL Listed (File No: E81895): JLLN (110 – 1200A) Littelfuse self-certified: JLLN 1-60A JLLS (1 – 1200A)

Ampere Ratings

1 30 90 250 8002 35 100 300 900*3 40 110 350 10006 45 125 400 110010 50 150 450 120015 60 175 50020 70 200 60025 80 225 700

* JLLS onlyExample part number (series & amperage): JLLS 100Note: Contact the factory for RoHS compliant Class T fuses.


LT300 series (for JLLN series fuses)LT600 series (for JLLS series fuses)LSCR002 (for JLLN/JLLS 700-1200A fuses)Refer to the Blocks and Holders section of this catalog for additional in for ma tion.

Space saving POWR-T fuses are the most compact fuses available in ratings above 30 amperes — less than one-third the size of comparable Class R fuses. When rated in ac cor dance with the NEC®, POWR-T fuses provide fast acting overload and short-circuit protection for non-inductive circuits and equipment. Used in inductive circuits, the ampere rating of POWR-T fuses must be increased to prevent opening on in-rush currents. In such instances, POWR-T fuses may provide only short-circuit protection.

Applications

Littelfuse Class T fuses can be used in applications that require fast-acting protection, such as equipment containing variable speed drives, rectifiers, and other surge-sensitive components. Main switches containing Class T fuses may be used to provide protection to individual electric services and meter stacks. Molded case circuit breaker load centers and Panelboards also will have increased interrupting ratings when “series rated” with Class T fuses.

Features/Benefits

Space-Saving – Switch enclosures, fuse pullouts, and other equipment using Class T fuses are usually more compact. Typical three-pole Class T fuse blocks require less than 50% of the panel space required by similar Class R blocks.

Longer Equipment Life and Increased Safety – Class T fuses provide fast, reliable protection against overcurrents up to 200,000 amperes. Extremely current-limiting design minimizes the damaging heating and magnetic effects caused by short-circuit currents.

Optional Mounting Types – In addition to the Class T dimensions, Littelfuse offers select ratings with PC board mounting tabs for specialty applications. PC board mount versions are UL Recognized. Contact the factory for more information.

NOTE: JLLN Class T 300 volt fuses are UL Listed for circuits not exceeding 300 volts to ground. However, since UL does not include testing 300 volt Class T fuses on 277/480 volt three-phase bolted faults, Littelfuse does not rec om mend using 300 volt Class T fuses where phase-to-phase voltage exceeds 300 volts.

Catalog 25-48.indd 41 5/30/07 6:19:23 PM



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B

CA

F

D F

EA

B

C

D

G

A

C

D

Fig. 1 Fig. 2 Fig. 3

Amperes Refer toFig. No. SeriesDimensions in Inches (mm in parentheses)

A B C D E F G

1 – 30 1JLLN 7⁄8 (22.2) — 9⁄32 (7.1) 13⁄32 (10.3) — — —

JLLS 11⁄2 (38.1) — 9⁄32 (7.1) 9⁄16 (14.3) — — —

35 – 601 JLLN 7⁄8 (22.2) — 9⁄32 (7.1) 9⁄16 (14.3) — — —

2 JLLS 19⁄16 (39.7) 13⁄16 (20.6) 13⁄32 (10.3) 1 (25.4) 1⁄16 (1.6) 13⁄32 (27.8) —

70 – 100 3JLLN 25⁄32 (54.8) 19⁄16 (39.7) 3⁄4 (19.1) 13⁄16 (20.6) 27⁄32 (21.4) 9⁄32 (7.1) 1⁄8 (3.2)

JLLS 261⁄64 (75.0) 223⁄64 (59.9) 3⁄4 (19.1) 13⁄16 (20.6) 141⁄64 (41.7) 9⁄32 (7.1) 1⁄8 (3.2)

110 – 200 3JLLN 27⁄16 (61.9) 111⁄16 (42.9) 7⁄8 (22.2) 11⁄16 (27.0) 27⁄32 (21.4) 11⁄32 (8.7) 3⁄16 (4.8)

JLLS 31⁄4 (82.6) 21⁄2 (63.5) 7⁄8 (22.2) 11⁄16 (27.0) 121⁄32 (42.1) 11⁄32 (8.7) 3⁄16 (4.8)

225 – 400 3JLLN 23⁄4 (69.9) 127⁄32 (46.8) 1 (25.4) 15⁄16 (33.3) 53⁄64 (21.0) 13⁄32 (10.3) 1⁄4 (6.4)

JLLS 35⁄8 (92.1) 223⁄32 (69.1) 1 (25.4) 119⁄32 (40.5) 123⁄32 (43.7) 13⁄32 (10.3) 1⁄4 (6.4)

450 – 600 3JLLN 31⁄16 (77.8) 21⁄32 (51.6) 11⁄4 (31.8) 119⁄32 (40.5) 7⁄8 (22.2) 31⁄64 (12.3) 5⁄16 (7.9)

JLLS 363⁄64 (101.2) 261⁄64 (75.0) 11⁄4 (31.8) 21⁄16 (52.4) 149⁄64 (44.8) 31⁄64 (12.3) 5⁄16 (7.9)

700 – 800 3JLLN 33⁄8 (85.7) 2 7⁄32 (64.3) 13⁄4 (44.5) 21⁄16 (52.4) 7⁄8 (22.2) 35⁄64 (13.9) 3⁄8 (9.5)

JLLS 4 21⁄64 (109.9) 311⁄64 (80.6) 13⁄4 (44.5) 21⁄2 (63.5) 155⁄64 (47.2) 35⁄64 (13.9) 3⁄8 (9.5)

900 – 1200 3JLLN 4 (101.6) 217⁄32 (64.3) 2 (50.8) 21⁄2 (63.5) 11⁄32 (26.2) 39⁄64 (15.5) 7⁄16 (11.1)

JLLS 5.27 (133.9) 3.80 (96.5) 2 (50.8) 2.63 (66.8) 2.30 (58.4) 0.67 (15.5) 0.44 (11.2)

Current-Limiting Effects of JLLS (600V) fuses

Short Circuit

Current*

Apparent RMS Symmetrical Current for Various fuse ratings

30A 60A 100A 200A 400A 600A 800A 1200A

5,000 750 1,225 1,400 2,850 4,600 5,000 5,000 5,000

10,000 945 1,525 1,700 3,600 6,000 8,500 9,400 10,000

15,000 1,050 1,700 2,000 4,050 6,600 9,750 10,500 13,000

20,000 1,150 1,900 2,200 4,450 7,250 10,500 11,000 14,750

25,000 1,300 2,050 2,400 4,800 8,000 11,500 12,500 15,500

30,000 1,375 2,150 2,450 5,000 8,250 12,000 13,750 16,500

35,000 1,400 2,250 2,600 5,100 8,500 13,000 14,000 17,000

40,000 1,425 2,400 2,800 5,200 8,700 14,000 14,750 18,000

50,000 1,600 2,450 2,900 6,000 9,500 14,500 16,000 20,000

60,000 1,650 2,625 3,100 6,250 10,000 15,500 17,300 21,000

80,000 1,825 2,800 3,400 7,000 11,000 17,000 18,750 23,000

100,000 2,000 3,100 3,700 7,250 12,000 18,000 20,000 25,000

150,000 2,250 3,400 4,300 8,500 13,000 21,000 23,000 28,500

200,000 2,450 3,800 4,600 9,000 15,000 23,000 25,000 31,000


Current-Limiting Effects of JLLN (300V) fuses

Short Circuit

Current*

Apparent RMS Symmetrical Current for Various fuse ratings

30A 60A 100A 200A 400A 600A 800A 1200A

5,000 700 775 1,100 1,650 3,500 4,000 5,000 5,000

10,000 900 1,000 1,400 2,100 4,400 5,100 6,750 8,250

15,000 1,000 1,100 1,600 2,400 5,000 5,900 7,750 10,000

20,000 1,100 1,250 1,800 2,700 5,500 6,500 8,750 11,000

25,000 1,230 1,300 1,950 2,900 6,000 7,000 9,500 12,000

30,000 1,300 1,475 2,050 3,100 6,400 7,500 10,000 12,500

35,000 1,330 1,575 2,150 3,300 6,750 7,750 10,500 13,500

40,000 1,430 1,600 2,300 3,500 7,000 8,000 11,000 14,000

50,000 1,500 1,750 2,400 3,700 7,500 8,750 12,000 15,000

60,000 1,700 1,900 2,700 4,000 8,000 9,500 12,500 16,000

80,000 1,850 2,100 2,800 4,400 9,000 10,500 14,000 17,500

100,000 2,000 2,250 3,150 4,800 9,750 11,500 15,000 18,500

150,000 2,300 2,600 3,600 5,500 11,000 13,000 17,500 22,000

200,000 2,600 2,800 3,900 6,000 12,000 14,500 19,500 24,000


Catalog 25-48.indd 42 5/30/07 6:19:26 PM







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JLLSJLLN

JLLSJLLN

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SLC Class G Fuses

480 VAC, 600 VAC • Medium Time-Delay • 1/2 – 60 Amperes

The compact design of Littelfuse SLC series Class G fuses offers a cost effective, space saving alternative to other fuse classes. The unique design of the SLC series provides superior time-delay characteristics over competitive products, which can increase system reliability and minimize downtime. Class G fuses meet NEC requirements for branch circuit protection and vary in length to prevent over-fusing when used with the appropriate Class G fuse block.

Features/Benefits

• Current-limiting – Reduces damage to equipment caused by heating and magnetic effects of short-circuit currents.

• 100,000 A.I.R. – Reliable interruption of all overcurrents up to 100,000 amperes.

• Time-Delay – Allows fuses to be sized closer to actual equipment requirements and may reduce downtime caused by power surges.

Note: For ap pli ca tions where greater time-delay is re quired, or where ratings exceed 60 am peres, con sid er se lect ing Littelfuse time-delay Class RK1, RK5, J or CC fuses.

A

B

C D

Specifications

Voltage Ratings: 600 Volts AC (1⁄2 – 20A) 480 Volts AC (25 – 60A)Interrupting Ratings: 100,000 amperes rms symmetricalAmpere Range: 1⁄2 – 60 amperesAp prov als: Standard 248-5, Class G UL Listed (File No: E81895) CSA Certified (File No: LR29862) QPL: Federal Specification No: WF-1814

Ampere Ratings

1⁄2 3 6 15 30 451 4 8 20 35 502 5 10 25 40 60

Example part number (series & amperage): SLC 10


LG300 series; L300G30 (for 25 and 30 amp fuses)Refer to the Blocks & Holders section of this catalog for additional information.

Amperes Refer toFig. No.Dimensions in Inches (mm in parentheses)

A B C D1⁄2 – 15 1 15⁄16 (33.3) 3⁄8 (9.5) 9⁄32 (7.1) 13⁄32 (10.3)

20 1 113⁄32 (35.7) 3⁄8 (9.5) 9⁄32 (7.1) 13⁄32 (10.3)25, 30 1 15⁄8 (41.3) 3⁄8 (9.5) 9⁄32 (7.1) 13⁄32 (10.3)

35 – 60 1 21⁄4 (57.2) 3⁄8 (9.5) 1⁄2 (12.7) 13⁄32 (10.3)

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Catalog 25-48.indd 44 5/30/07 6:19:29 PM





Class CC and Class CD Fuses

600 VAC • 1/10 – 60 Amperes

Compared to other UL Listed fuses, Class CC has the most current-limiting fuse design available, rating for rating. Be cause they are physically compact, they provide this superior protection in a fraction of the space required by other fuse classes. For example, when 600V three-pole, 30 ampere Class R fuse blocks are replaced by Littelfuse Class CC fuse blocks, panel mounting space is reduced ap proximate ly 70%. This is especially important when a panel contains many fuses to protect multiple circuit components.

Applications

Three types of Class CC fuses, specifically designed to protect different types of components

1) Motor protection — CCMR series; dual-element, time-delay fuses specifically designed to protect motor circuits up to 40 HP**.

2) Small transformer protection (control power transformers) — KLDR series, time-delay fuses designed to withstand the high magnetizing in-rush of transformers.

3) General purpose protection of equipment requiring fast overload protection — KLKR series, fast-acting fuses used for protection of equip ment containing solid-state devices or other electronic components requiring fast response on overloads.

Safety


• Extremely current-limiting — Reduces damage caused by heating and magnetic effects of short-circuit currents. Stops damaging short-circuit currents faster than any me chani cal protective device.

Space Saving

• Class CC and CD fuses are the smallest 600V, 200,000 A.I.R. fuses approved for branch circuit protection.

Economical

• Current-limiting design often permits use of readily avail able, less costly equipment.

Specifications

Voltage Ratings: AC: 600 Volts DC: 250 – 500 Volts (CCMR) † 300 Volts (KLDR) 300 Volts (KLKR)Interrupting Ratings: AC: 200,000 amperes rms symmetrical DC: 20,000 amperesAmpere Range: CCMR: 2 ⁄10 – 60 amperes KLDR: 1⁄10 – 30 amperes KLKR: 1⁄10 – 30 amperesApprovals: AC: Standard 248-4, Class CC UL Listed 1⁄10-30 Amps (File No: E81895) Standard 248, Class CD UL Listed 35-60 Amps (File No: E71611) CSA Certified 1⁄10-30 Amps (File No: LR29862) DC: Littelfuse Self-certified


LPSC series (for 1⁄10–30A)L60030C series (for 1⁄10–30A)L60060C series (for CCMR 35–60A)Refer to the Blocks and Holders section of this catalog for ad di tion al in for ma tion.†Refer to the POWR-PRO® section for additional information.

1.880 REF.

.850 +-.02035-60A

** Consult the Motor Protection Tables in the Fuseology section for specific motor sizing information

1.50"(38.1 mm)

.50"(12.7 mm)

.41"(10.3 mm)

.25"(6.4 mm)

.125"(3.2 mm)

0-30A

Catalog 25-48.indd 45 5/30/07 6:19:32 PM



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600 VAC • 1/10 – 60 Amperes

For space saving protection of motor circuits up to 40 HP**, we recommend Littelfuse POWR-PRO® CCMR series fuses. These fuses are the only true dual-element time-delay CC fuses specifically en gi neered for motor branch circuit pro tec tion. They pro vide Type 2 “No Damage” pro tec tion to both NEMA-rated and the more sensitive IEC (International Electrotechnical Commission) type motor circuit components.

CCMR series fuses are now available in larger sizes — from 35 to 60 amperes! No other 600V fuse is avail able with this current carrying capacity in a package this small.

For more information on CCMR series Class CC fuses, see the CCMR series pages in the POWR-PRO section of this catalog.1⁄10 – 30A: UL Listed Class CC 35 – 60A: UL Listed Class CD

KLDR fuses are time-delay fuses specifically designed for the protection of control transformers, so le noids and similar inductive com ponents with high mag ne tiz ing currents during the first half-cycle. They closely match most control power transformer characteristics, which permits the fuses to be sized in ac cor dance with the latest revisions of UL 508 (Industrial Control) and UL 845 (Motor Control Centers). When the time delay of KLDR fuses is adequate to carry motor starting current, they provide ex cel lent protection of motor branch circuits con tain ing IEC or NEMA rated motor con trol lers or contactors.

CCMR Series

KLKR Series

KLDR Series

KLKR series Class CC fuses are fast acting fuses intended for general purpose branch circuit protection. Their compact size, fast acting overload response, and highly current-limiting design make them ideal for use in OEM equipment and control panels. Solid state devices such as SCRs and other electronic equipment generally require fast acting protection.

Ampere Ratings

2 ⁄10 11⁄4 21⁄2 5 9 301⁄4 14⁄10 28⁄10 56⁄10 10 35

3⁄10 11⁄2 3 6 12 401⁄2 16⁄10 32 ⁄10 61⁄4 15 45

6⁄10 18⁄10 31⁄2 7 171⁄2 508⁄10 2 4 71⁄2 20 601 21⁄4 41⁄2 8 25

Example part number (series & amperage): CCMR 30**Consult the Motor Protection Tables in the Fuse-ology section for specific motor sizing information

Ampere Ratings

1⁄10 6⁄10 18⁄10 41⁄2 101⁄8 3⁄4 2 5 12

15⁄100 8⁄10 21⁄4 5 6⁄10 15⁄16 1 21⁄2 6 171⁄2

2 ⁄10 11⁄8 28⁄10 61⁄4 201⁄4 11⁄4 3 7 25

3⁄10 14⁄10 32 ⁄10 71⁄2 304⁄10 11⁄2 31⁄2 81⁄2 16⁄10 4 9

Example part number (series & amperage): KLDR 5 6⁄10

Ampere Ratings

1⁄10 1⁄2 21⁄2 6 121⁄8 3⁄4 3 7 15

2⁄10 1 31⁄2 8 201⁄4 11⁄2 4 9 25

3⁄10 2 5 10 30

Example part number (series & amperage): KLKR 25

Catalog 25-48.indd 46 5/30/07 6:19:36 PM






600 VAC • 1/10 – 60 Amperes

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For performance data on Littelfuse CCMR series Class CC fuses, see the CCMR pages in the POWR-PRO® section of this catalog.

KLDR KLKR

KLDR KLKR

Catalog 25-48.indd 47 5/30/07 6:19:42 PM



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Plug Fuses125 VAC • Time-Delay • 1/4 – 30 Amperes

Edison-base Plug fuses

TOO Fuses are dual-element time-delay Edison-base fuses designed for motor and motor branch circuit protection; also suitable for all general purpose circuits. Use for replacement purposes only.

Ampere Ratings

3⁄10 11⁄8 21⁄4 4 7 154⁄10 11⁄4 21⁄2 41⁄2 8 201⁄2 14⁄10 28⁄10 5 9 25

6⁄10 16⁄10 3 5 6⁄10 10 308⁄10 18⁄10 32 ⁄10 6 121 2 31⁄2 61⁄4 14

TLO Fuses are medium time-delay Edison-base fuses designed for general purpose branch circuit protection. See TOO and SOO fuses for motor protection. Use for re place ment purposes only.

Ampere Ratings

15 20 25 30

Type S Plug fusesSOO Fuses are dual-element time-delay Type S fuses designed for motor and motor branch circuit protection; also suitable for all general purpose circuits.

Ampere Ratings

1⁄4 1 2 31⁄2 61⁄4 143⁄10 11⁄8 21⁄4 4 7 154⁄10 11⁄4 21⁄2 41⁄2 8 201⁄2 14⁄10 28⁄10 5 9 25

6⁄10 16⁄10 3 5 6⁄10 10 308⁄10 18⁄10 32 ⁄10 6 12

SLO Fuses are medium time-delay Type S fuses for general purpose branch circuit protection.

Ampere Ratings

15 20 25 30

Littelfuse Plug fuses provide overcurrent protection to general purpose circuits and small motor loads. Edison-base Plug fuses (TOO and TLO series) feature metal threads similar to incandescent lamp bases. Type S Plug fuses (SOO and SLO series) utilize a nonmetallic threaded base and must be used with Type S adapters (SAO series). The National Electrical Code permits Edison-base Plug fuses to be used for replacement purposes only. Type S fuses and adapters prevent shunting open fuses and over-fusing.

SAOAdapter Rating

AcceptsFuse Ratings:

Other SOO Fuse Ratings Which Fit

SAO 1 3⁄10 – 1 —SAO 11⁄4 11⁄8, 11⁄4 3⁄10 – 1SAO 16⁄10 14⁄10, 16⁄10 3⁄10 – 11⁄4

SAO 2 18⁄10, 2 —SAO 21⁄2 21⁄4, 21⁄2 18⁄10, 2SAO 32 ⁄10 28⁄10, 3 2 ⁄10 18⁄10 – 21⁄2

SAO 4 31⁄2, 4 —SAO 5 41⁄2, 5 31⁄2, 4

SAO 61⁄4 31⁄2, 61⁄4 31⁄2 – 5SAO 8 7, 8 —SAO 15 7, 8, 9 10, 12, 14, 15 7, 8, 9, 10SAO 20 20 only —SAO 30 20, 25, 30 —

Specifications

Voltage Rating: 125 VAC Interrupting Rating: 10,000 amperes rms symmetricalApprovals: UL Listed Plug Fuses, Standard UL 248-11

Note: See NEC Article 240-V for additional information on Plug fuse applications.

Catalog 25-48.indd 48 5/30/07 6:19:43 PM


General Purpose FusesKLLU Class L FusesFLNR_ID/FLSR_ID Indicator® Class RK5 FusesFLNR/FLSR Class RK5 FusesNLN/NLS Class K5 FusesRLN/RLS Class H FusesJLS Class J FusesJLLN/JLLS POWR-T™ Class T FusesSLC Class G FusesClass CC and Class CD FusesPlug Fuses

General Purpose Fuses - Steven Engineering...General Purpose Fuses KLLU Class L Fuses 26-28...

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Transcript of General Purpose Fuses - Steven Engineering...General Purpose Fuses KLLU Class L Fuses 26-28...