Help identifying a Motorola transistor (in HP 7908 PSU)

12 Nov 2005

...

Partial help:

"4-456" is probably a short version of the HP house  number, 
 >the more complete number is likely "1854-0456". 
Sounds plausible. 1854-0456 appears to cross reference
to a TIP41A which is NPN and a TO-220 package. I'd
expect to see an NPN device in the part of the circuit
where this is being used and the package matches
what's on the board.

Thanks !

Dave

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Help identifying a Motorola transistor (in HP 7908 PSU)