Quote:
Originally Posted by Argus25
The transistor BC640 (pnp) has a reverse Vbe of 11V, which is better than most silicon transistors...
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Not according to ON Semiconductors data (attached)! They say 5V.
The only silicon transistor that I know with any half-decent reverse Vbe capability is the OC200 (20V), and possibly others in that series.
It might pair-up with an NPN to create a BRY39 replacement, at least to this voltage.