I've tested this as a PNP. I need to find two of these. Is it a 1c327 or a c327 or a sc1327? I cannot find any definite identification on this nor would I know what datasheet to use.

Another transistor that is obsolete that I need to find is a PNP BC307B.

Any help would be much appreciated!!

 

It’s a C327 - that’s what I’d search on. I wouldn’t worry so much about finding an exact replacement as long as you can find the datasheet so that you can match up the specs.

 

Welcome to AAC!

I'd say it's 2SC327 or BC327.

 

Thanks for the welcome, been reading through things for a long while and decided to chime in when I had this issue.

The transistor came out of Germany years ago, as it is part of an automobile idle control module. I was able to figure out the two other transistors, NPN BC337-25 and PNP BC307B - they were clearly marked. So, I guess, it would make sense to identify the pictured transistor as a BC327. Problem is, when I look at several different data sheets for bc327, some list positive voltages while other show negative voltages. I would assume since the other two transistors show positive voltages in their data sheets that the 327 should be positive as well. I don't know enough about the board to figure out what would be used. However, I would think that in 1984 they probably stayed with positive voltages in a vehicle that was 12 volts negative ground. But I can't be sure. Any ideas out there?

Thanks!!

 

The transistor came out of Germany years ago, as it is part of an automobile idle control module. I was able to figure out the two other transistors, NPN BC337-25 and PNP BC307B - they were clearly marked. So, I guess, it would make sense to identify the pictured transistor as a BC327.

BC prefixed transistors are common in Europe, 2SC in Japan, and 2N in the US.

There doesn't seem to be a standard for using negative numbers on PNP transistors. I looked at a couple from OnSemi. For BC327, they use negative numbers; for 2N3906, they don't. Could be a regional convention.