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The counterfeits often try to use the more elaborate slant “T. Post 5 of Post 6 of Post 8 of I have two sets I recently obtained, the first, from RF Parts datasheeh no source identification are seen below: Post 15 of Post 1 of Post 2 of I’ve also never seen the 2SC with the straight “T”, but they are known to be genuine that way with the 2SA’s. I was going to say that I haven’t seen green in these particular transistor sets, so I’d vote for the bottom grouping as being genuine.


You must log in or sign up to reply here. Oct 9, at 3: MCM is easily your best chance of getting the real thing, too. It’s quite possible that both groups are genuine – it’s usually more obvious if they’re fakes than they are here. Post 14 of Post 4 of Oct 4, at 8: Post 12 of Looks like I may need to make a more elaborate test jig and see if we can get some analytical data to advance the conversation. I 2sc2283 think the green ones are probably a reduced HFE output version, though.


It helps to see the backs, too. Do you 2sc238 have an account?

Silicon NPN Power Transistors

Bag and tag from Japan doesn’t mean much – I’ve had Korean and Indian in those bags. Oct 9, at 4: It does seem fairly silly for what should be a simple set ratasheet transistors.

These are up to spec. Headphone Reviews and Discussion – Head-Fi. Post 10 of Oct 7, at 9: No, create an account now. I hear you Tom. Need help from Experienced Eyes: Post 11 of The moral here is that genuine Toshibas or not – where they are manufactured makes a difference.

Post 9 of This thread is starting to get very interesting.

I checked them and the gain of the straight T version were abyssmal. The ones from other parts of asia have the s2c2238 T as in your examples.

2SC datasheet, Pinout ,application circuits Silicon NPN Power Transistors

Post 7 of To be honest, the fakes are more obvious than that. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. I think doubt is always going to be a problem with obsolete parts, regardless of the number of counterfeits out there.


My over-whelming instinct is datashfet just use a current production part and be done with it.

The Japanese are in short supply as well and buy them where they can get them. I have the same pairs of transistors on hand from Farnell so it should be genuine for the first one. I wonder how long it will be before we start seeing fake Lovoltech LUD.

Yes, my password is: Oct 8, at Post 3 of Oct 7, at 8: Share This Page Tweet. Also, the round indentation with letters and numbers are known to be used on the genuine 2SA’s. By continuing to use this site, you are consenting to our use of cookies. Anyway, that’s about datasheett extent of my experience with them.