Micro Probe
Test Center .025 (0.64)


Spring Force

How to Order


Probe Specifications
Full Travel: .075 (1.91)
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: 2 amps
Maximum continuous current, non-inductive at working travel

Probe Resistance 50 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: Heat-treated beryllium copper, HPA-GOLD" plated (I.D. and O.D.) over hard nickel
Spring: Music wire, silver plated
Receptacle Specifications
Mounting Hole Size: .0205/.0215 (0.52/0.55)
.025 (0.635) Test Centers
A #75 or 0.52 mm drill is most commonly used

Wire Gauge:
30 AWG

Connections: Crimp
(To order with 30 inches of 30 AWG wire attached, add -30 to model number) Shrink tubing is recommended on alternating receptacles. Order Model No.ST -20
NOTE: The top of the MEP-20 barrel is flared, enabling it to be "press-fit" directly into the probe plate, eliminating the need for a receptacle or epoxy. This "press fit" feature also permits the MEP-20 to be installed in a variety of probe plate thicknesses and to be replaced easily. Recommended Probe plate materials are G-10 and G-11. The MEP-20 is terminated with the use of a crimp tool, which attaches a wire directly to the probe in the same fashion that a wire is attached to a crimp style receptacle.

Materials and Finishes Heat-treated beryllium copper, HPA-GOLD" plated (I.D. and O.D.) over hard nickel

Tips (top)

Spring Force (top)

Spring Force in 0z. (grams)
Spring Type Preload Recommended Travel in. (mm) Force oz. (grams)
MEP-20 .39 (11) .05 (1.27) 1.39 (39)

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

Copyright (c) 1998-2001 Everett Charles Technologies. All rights reserved. Everett Charles Technologies, 700 E. Harrison Ave., Pomona, CA, 91767, U.S.A.