muzikliberated
Active member
- Joined
- Mar 7, 2013
- Messages
- 33
Hey group.
I'm working on a very old psu circuit from an Oberheim SEM module.
D40D2 (NPN) / D41D2 (PNP) TO-202 power transistors are used here which I can't seem to find anywhere for a decent price.
I'm guessing that the circuit wouldn't be too fussed at a modern equivalent.
While maximum ratings differ, I'm looking at these as replacements, hoping for some advice as to whether I've chosen wisely or not. These seem over specced, which I'm hoping is a good thing.
I do see that all the max ratings on the D40D2 show as negative voltages though, where the chosen replacement shows positive maximums in its datasheet, which is worrying me.
In place of the D40D2
https://www.digikey.com/en/products/detail/central-semiconductor-corp/CEN-U07-PBFREE/4806927
In place of the D41D2
https://www.digikey.com/en/products/detail/central-semiconductor-corp/CEN-U57-PBFREE/4806929
thanks in advance, hope I posed my question well enough.
I'm working on a very old psu circuit from an Oberheim SEM module.
D40D2 (NPN) / D41D2 (PNP) TO-202 power transistors are used here which I can't seem to find anywhere for a decent price.
I'm guessing that the circuit wouldn't be too fussed at a modern equivalent.
While maximum ratings differ, I'm looking at these as replacements, hoping for some advice as to whether I've chosen wisely or not. These seem over specced, which I'm hoping is a good thing.
I do see that all the max ratings on the D40D2 show as negative voltages though, where the chosen replacement shows positive maximums in its datasheet, which is worrying me.
In place of the D40D2
https://www.digikey.com/en/products/detail/central-semiconductor-corp/CEN-U07-PBFREE/4806927
In place of the D41D2
https://www.digikey.com/en/products/detail/central-semiconductor-corp/CEN-U57-PBFREE/4806929
thanks in advance, hope I posed my question well enough.