My Transistors, original or copy?

[jacco vermeulen]

Originally Posted by Leakstereo20

where ?

If they're difficult to get in Denmark, order direct from Profusion in the UK.

(the Sankens, and all other Japanese semi-parts, have been available here for 3 decades. A couple of years more than I have bought them, so it comes free. The DIY experience I have in general will likely scare you)

[Leakstereo20]

Originally Posted by jacco vermeulen

If they're difficult to get in Denmark, order direct from Profusion in the UK.

(the Sankens, and all other Japanese semi-parts, have been available here for 3 decades. A couple of years more than I have bought them, so it comes free. The DIY experience I have in general will likely scare you)

Thanks for the UK link...I am not that easy to scare

I am sure that you got experience. The supplier I bought the Toshiba's from promised me 10 new pcs of genuine Toshiba 2SA1943.
My experience and my measuring equipment is not enough to evaluate a difference between the Chinese and Japanese transistor types, but my genius of a buddy can do it.
I shall try to return with some measurements of the two 2SA1943 transistor types.

[duder1982]

Hey folks any way to tell if a transistor is a fake or not by picture, or has anyone purchased Toshiba 2sd845/2sb755 from ebay seller.

I was looking at these,

1pair or 2pcs Transistor Toshiba MT 200 2SB755 2SD845 B755 D845 | eBay

all so how do I want these matched, I was told I did, and didn't but if I can get them matched that would just be better regardless.

Thanks

[bear]

No way I know of to tell by a picture alone - especially since they may show a pic of genuine parts and ship something else.

Roll the dice...

_-_-

[sbrook]

Given the source, I'd be very suspicious!

[franzm]

@duder1982: I bought some transistors from this seller (different type). Shipment was extremely slow. Some transistors were missing due to poor packaging.

[duder1982]

There was a U.S. seller that was selling some matched pairs on the bay a while back, I wish I would have pulled the trigger for those.

[gman76]

I'd be careful of ANYTHING from China. I worked for a nonvolatile memory company, and you wouldn't believe how much counterfeiting has been going on in the last few yrs. Some assembly house in SE Asia would take either a commodity die and package that up, then sell it as a our device (of course at a premium price). Sometimes we would open up the package all to find NO DIE inside, no wire bonds, just a lead frame. These assembly houses even got our part marking to the point where we had a hard time identifying it as a counterfeit, they would copy previous date code and lot code combinations. And of course copy the logo pretty well.

The main problem is that all this junk in going thru the brokers. If you buy from a non-authorized distributor, all bets are off.