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Easy test jig to match 520s

nbsr

Active Member
Mar 29, 2014
88
97
28
Hudson Valley, NY
I am coming by more z24s blown and enough 3, 4, or 8 520s blowing that I'd like to replace them with matched 520s. There is a lot of variations on how to, but not consistent, and I don't want to pay anyone to say they are so.
Vgs, thermal conditions, supply v, applied ma, I'd like a simple set up to test them (a bunch) to take care of my customers.
I'm a simple guy and want to keep it simple.
Any insight before the rabbit hole I've dug can be undug, or is that de-dug?
I actually looked into a Hafler box but they are long gone.
I appreciate any insight.
Mark
 

There used to be a doodad called an "M-Tester" on AliExpress (I got one for testing/matching transistors and analysing capacitors). Not made anymore but I saw something similar on Amazon. They were ~$50 in a case or $20 for the bare unit.
 

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