C556 and C546 transistor

[jmctech]

Hello,

I have been tasked with trouble shooting a board for a obsolete machine, the board controls a couple of motors, looks like current limiting resistors for the motors failed short and over loaded the main transistors (bvd64b & bvd67A) and these transistors pictured which were hooked to the base of the main transistors. My question is, I was able to find c546 transistors in a cross reference, but all I can find for the 556 is BC556. I have not been able to find any info on a c556. Are these BC### and the B is just not on the case? Or are they different?

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[amspire]

It is the BC546 (NPN general purpose) and BC556 (PNP general purpose) transistors. Originally designed by Philips.

[jmctech]

It is the BC546 (NPN general purpose) and BC556 (PNP general purpose) transistors. Originally designed by Philips.

Thank you

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[Peabody]

Could be 2SC546 and 2SC556.

[amspire]

Could be 2SC546 and 2SC556.

They are Philips BC546/556. I have a some Philips BC557B transistors with the silvered front and the same PH code.