Need help finding this part

[swordfish689]

I received this amp that was missing alot of pieces, i finally got to to the point where its missing one part. OP1 on the picture , i know its a optocoupler, but i need to know the part number. The amp is an audiobahn a275hct. If someone can that help that would be great. I think other audiobahn amps are made the same.

[Perry Babin]

I think it's likely a KTC117. I doubt that you'll find that part unless you can get it from audiobahn or from a manufacturer using a similar design like power acoustic.

If you can't get an exact replacement, a PS2503-1 may work.
http://www.cel.com/pdf/datasheets/ps2503.pdf

[swordfish689]

Thanks perry, i was going to try a 2501-1 , that i have from a old alpine, but i see on the datasheet, that its different. I'll try your suggestion.

[Perry Babin]

It looks like the 2501 would work as well. The only difference I see is that the 2503 has an internal resistor (which isn't indicated on the schematic I have).