Diode Tester

FEC VF40CM - Frothingham Electronics Corporation (FEC)

The VF40CM is intended for testing VF, HALF CYCLE SURGE, and THERMAL RESPONSE/RESISTANCE on small- and medium-power diodes and rectifiers. It can also measure THERMAL RESPONSE/RESISTANCE on NPN and PNP bipolar transistors using an external user-supplied VCB supply.

The VF40CM also is sometimes used to measure VZ of low-voltage zener diodes up to the compliance voltage limit of the tester. 20V at 20A is possible.