050-R40 Series .050 [1.27] Center, .400 [10.16] Stroke

August 16, 2012

QA is pleased to announce the addition of our 050-R40 Series, .400 [10.16] stroke .050 [1.27]center long stroke probe for dual-level testing on 50mil centers. These long-stroke probes areeasily mixed with their standard-stroke counterparts from the 050-R25 series. Long-stroke andstandard-stroke probes with the same center spacing are used in identical sockets.

Point Styles

All dimensions are in inches [mm]. All spring forces are in ounces [gms].

8R- ~ Razor

Probe SpecificationsFull Stroke: .400 [10.16] Working Stroke: up to .317 [8.05]Operating Temp: -50° to 250°F [-45° to 120°C]Average Resistance: < 40 mOhms Current Rating: 9.5 Amps

6R- ~ Razor

Tube Letter Material/Finish

P Nickel silver / ID precious metal clad

Poin

t Digit Material/FinishSee

PointsStandard material is heat treated BeCu / plated gold over nickel(see S option for steel plungers)

Sprin

g Letter Preload@ .317Stroke

MaterialMechanical Life

(cycles @ stroke)

X 1.5 [43] 6.0 [170] Stainless Steel 250K min @.317 [8.05] max

Opt

ion

Letter Description

DDecreased stroke is .250 [6.35]. Must select from 050-R25 series spring forces with this option.

NNo probe lubrication. Removing probe lubrication greatly reduces cycle life and should be only used in applications outside of the probe operating temperature specifications.

S Heat treated steel / plated gold over nickel

Part Number: 050-PRP40 X -

46 - Flat Star

76 - Center Point Star

Spring Force

Probe

0

57

113

170

227

283

0.00 2.54 5.08 7.62 10.16

0.0

2.0

4.0

6.0

8.0

10.0

12.0

0.000 0.050 0.100 0.150 0.200 0.250 0.300 0.350 0.400

Fo

rce

(Gra

ms)

Plunger Stroke (Millimeters)

Fo

rce

(Ou

nce

s)

Plunger Stroke (Inches)

X

.317(8.05)Stroke

As shown to the right, the long-stroke probe tips are .150 [3.81]higher than neighboring standard-stroke tips when the fixture is notactuated. In the functional test position, the long-stroke probes are deflected .060 [1.524], leaving.090 [2.29] clearance to the tips ofthe standard-stroke probes. Duringin-circuit test, deflection of thelong-stroke probes is .317 [8.05],and the standard-stroke probes aredeflected .167 [4.24] (the recom-mended two-thirds travel position).

Fixture Not Actuated

.150 Tip Height

Difference

.250

Stro

ke P

robe

.400

Stro

ke P

robe

Functional Test Position

.060 Stroke

.090 Gap

Unit Under Test

.250

Stro

ke P

robe

.400

Stro

ke P

robe

In-Circuit Test Position

Operational Position

@ .317Stroke

@ .167Stroke

.250

Stro

ke P

robe

.400

Stro

ke P

robe

Unit Under Test

Unit Under Test

.015 .015.015

The illustration above shows the typical positions of both a standard.250 stroke and .400 long-stroke 050-R40 in dual level testing. Toachieve the .150 tip height difference, set the socket .015 lower onthe the .400 stroke.

Sockets

QA Technology Company, Inc. 110 Towle Farm Road, Hampton, NH 03842 USATel: (603) 926-1193 • Fax: (603) 926-8701 • sales@qatech.com • www.qatech.com