I've been investigating an old motor controller unit and found it uses a BUR50S transistor for its motor PWM, that's a 125V 70A rated TO3 with hfe = 15, fT = 16MHz, max dissipation 350W.
Alas there's only one (the controller uses a humongous relay to reverse the motor rather than 4 devices in an H-bridge). I think the thing could form a nice Darlington triple with a BD139->2N3055->BUR50S, should handle 1 ohm loads nicely 🙂, but fortunately I don't have complementary pair so won't waste time on such a crazy idea!
Alas there's only one (the controller uses a humongous relay to reverse the motor rather than 4 devices in an H-bridge). I think the thing could form a nice Darlington triple with a BD139->2N3055->BUR50S, should handle 1 ohm loads nicely 🙂, but fortunately I don't have complementary pair so won't waste time on such a crazy idea!
Jeff, re your wish at #17:
https://www.datasheetarchive.com/pd...bdf311abb67754950e2070491ba&type=M&term=BDY58
https://www.datasheetarchive.com/pd...bdf311abb67754950e2070491ba&type=M&term=BDY58
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