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millwood 10th May 2003 11:35 PM

replacement for 2sb649/2sd669
I need a set of npn/pnp driver transistors in a 55-60 vdc applications (so the tip31/32 twin is out). originally the schematics used 2sb649/2sd669 but digikey doesn't have them so I am looking for alternatives here.

The transistors will be driving 3-4 mosfets, BTW.

Any suggestions? Thanks in advance.

moamps 11th May 2003 02:14 PM


2SA1837, 2SC4793


rljones 12th May 2003 11:55 PM

millwood, stocks the pieces you are looking for.

regards, robert

millwood 13th May 2003 12:15 AM

thanks, guys. That's great.

rljones 13th May 2003 12:53 AM

the 2sb649/2sd669 driving output mosfets sounds like a randy slone amp. he seems to use them in many of his books; nice fellow.

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