Hello Good Digikey Folks!
I was excited to see a 2SC1969 offered by EVVO here, 5272-2SC1969-ND, but on further scrutiny, it is not a true 2SC1969, which is a HF linear SSB power transistor used in CB radio finals as well as ham radio drivers (see attached)
I thought JEDEC was pretty pedantic about no number reuse unless an equivalent. Can someone wiser than me explain the discrepancy?
Thank you muchly!
2SC1969.PDF (151.3 KB)
One clarification that resolves the puzzle: the 2SC numbers are not JEDEC registrations at all. JEDEC is the US scheme with the 1N/2N prefixes, while 2SA/2SB/2SC/2SD type numbers come from the Japanese system, standardized as JIS C-7012. Those numbers were registered by the Japanese manufacturers, but there is no global enforcement, so a factory outside that registry can print an already-used number on its own part, and popular RF numbers get reused that way quite often. A shared marking therefore does not imply equivalence: the Mitsubishi datasheet defines the real 2SC1969, and any other 2SC1969 is only worth what its own datasheet says. If the EVVO document shows a different package, dissipation or gain, it is simply a different transistor wearing a borrowed name.
A correction to my own post above: the numbered part of it stands, the rest was broader than what I can actually source. What holds up: 2SA/2SB/2SC/2SD type numbers come from the Japanese system standardized as JIS C-7012, with the individual numbers assigned through JEITA’s registration center, not from JEDEC and its 1N/2N scheme. A shared marking by an unrelated manufacturer therefore does not by itself make the parts equivalent, so the practical question for the EVVO listing is a datasheet comparison - package, dissipation, gain and frequency performance against the Mitsubishi document, nothing more.
