Short Travel Probe
Test Center .050 (1.27)


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 +105°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 35 milliohms
With a standard deviation of <4 milliohms @ 25 mA test current

Materials and Finishes
Plunger: Heat-treated beryllium copper, gold plated over hard nickel
Barrel: Work-hardened phosphor bronze, HPA-GOLD" plated (I.D. and O.D.) over hard nickel
Spring: Music wire, gold plated
Receptacle Specifications
Mounting Hole Size: .035/.0365 (0.89/0.93)
A #64 or 0.92 mm drill is most commonly used

Wire Gauge:
28-30 AWG

Connections: SPR-0W Crimp (To order with 30 inches of 28 AWG wire attached, add -28 to model number. For 30 AWG wire, add -30 to model number.)

SPR-0W-1 Solder cup

SPR-0W-4 FASTITE® wire termination (30 AWG only), maximum insulation diameter = .019 (0.48), wire strip length = .125 (3.2)

DS-62-1 Insulation sleeve (use with SPR-0W-4)

FWA-1-30 30 AWG wire with DS-62-1 insulation sleeve attached

Materials and Finishes Work-hardened nickel silver, gold plated over hard nickel

One DS-62-1 sleeve is provided with each SPR-0W-4 receptacle at no charge. If additional quantities are required, please contact the factory for pricing and delivery.
The HPA-50 may be used to test bare PCBs on mixed test centers with the SPA-64 and HPA-52 probes.

Tips (top)

Spring Force (top)

Spring Force in 0z. (grams)
Spring Type Preload Full Travel
HPA-50 1.55 (44) 3.2 (91)

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

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