Is it possible to measure SCR VRGM using a curve tracer?

kubeek

Joined Sep 20, 2005
5,791
Dunno, but I don´t think a curve tracer is suited for such test. IIRC there is one p-n junction from gate to cathode, so if you exceed the reverse breakdown voltage of that junction, you will see a steep incresase in gate current.

Nevertheless, this says nothing about any relation to Vrgm, i.e. what voltage actually breaks the SCR beyond recovery. That would mean trying a lot of SCRs and checking if they are burnt yet while cyclicaly increasing the reverse voltage applied.

A lot of time and money spent on a seemingly pointless test. Just keep your voltage below the recommended level.
 
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