Performance Probe
Test Centers
.100 (2.54)
.125 (3.18)
.156 (3.96)
.187 (4.75)


Spring Force


How to Order


Probe Specifications
Full Travel: .050 (1.27)
Working Travel:
.050 (1.27)
Mechanical Life Exceeds: 1 x 106 cycles

Operating Temperature -55°C to +150°C
Consult factory for other temperature requirements, and applications below -40°

Electrical (Static Conditions)
Current Rating: 3 amps
Maximum continuous current, non-inductive at working travel

Probe Resistance 50 milliohms
With a standard deviation of <8 milliohms @ 25 mA test current

Materials and Finishes
Plunger: Heat-treated beryllium copper, gold plated over hard nickel
Barrel: Work-hardened nickel silver over hard nickel
Spring: Stainless steel, silver plated
Receptacle Specifications
Mounting Hole Size: .067/.069 (1.7/1.75)
A #51 or 1.75 mm drill is most commonly used

Wire Gauge:
26-30 AWG

Connections: SPR-64W-2 Wire wrap/square post, 100% vacuum sealed

Materials and Finishes Nickel silver alloy

Hole Diameters to be Contacted
SPA-64-1 up to .073 (1.85)
SPA-64-2 lands and pads
SPA-64-3 lands and pads
SPA-64-4 up to .058 (1.47)
SPA-64-7 up to .150 (3.81)
SPA-64-8 up to .070 (1.78)
SPA-64-9 lands and pads
SPA-64-10 lands and pads
The SPA-64W-2 can be used to test bare PCBs on Mixed test centers with the HPA-50 and HPA-52.
Recommended Test Centers
SPA-64-1, -2, -3, -4, -8, -9, -10 .100 (2.54)
SPA-64-7 .187 (4.75)
Model No. Dimension A
SAP-64-1, -4, -7 .375 (9.53)
SPA-64-2, -3 .365 (9.27)
SPA-64-8 .385 (9.78)
SPA-64-9, -10 .363 (9.22)

Tips (top)

Spring Force (top)

Spring Force in 0z. (grams)
Spring Type   Preload Full Travel
Standard Shown 1.1 (31) 3.85 (110)
Optional spring forces and materials are available

Connectors (top)


How to Order (top)

For each probe, specify the probe model and tip style as shown in the example below. If required, specify the optional non-standard spring force.


Order Form

©1998-2003 Everett Charles Technologies. All rights reserved. Everett Charles Technologies, 700 E. Harrison Ave., Pomona, CA, 91767, U.S.A.