On Saturday, 26 October 2019 00:34:28 UTC+1, TheExperimenter wrote:

I desperately need these three items for a project, but I'm having a
hard time finding them. I had hoped to order all from a single source
to save shipping costs, but I don't know if that's feasible. A cross
reference with same pinouts might be helpful, but even having trouble
with that... and running short on time. Any parts source and/or good
cross reference would be welcomed. Thank you.

D40D5 NPN power tab transistor

Can you not get something else that meets the necessary specs?

2n2646 UJT

are those still used? Ordinary transistor breakdown might be used to replaced that.

MCR 106-8 or C107D

a very familiar number. 400v scr. Got some of those.

or 2n4444

600v scr

Presumably you're just doing repairs with these parts.


NT