Rasz has it right just dispute and document it. Seller's name is Semitronus If you have bought any of these, I suggest that you check them before use. I really want to leave negative feedback to warn others. Does anybody know when on-semiconductor stopped making high voltage BJTs for smps? I contact the seller, he told me he has sold hundreds no complaints, but will give refund if I return them. I am sure that these parts were obsolete along time before this. And specification show that the gain should be around 30: Here is a picture of the fake transistor: If I am reading the datecode correctly, this would be the 23rd week of 2015. This is the specifications: For good measure this is the current gain: The gain is around 250. This is the measured breakdown voltage with the Base-Emitter open: The measured breakdown voltage is 110V.
Here are the test results: This is the measured breakdown voltage with the Base-Emitter shorted: The breakdown voltage is 340V. The highest voltage is with the base-emitter shorted, the lowest voltage is with the base-emitter open.
Bipolar transistors have a different breakdown voltage, depending on the base connection. Fortunately, I have a Tektronix 576 Curve tracer, so I checked the transistors before using them. I have reported the item and several other items to eBay as being counterfeit, but as of now no action has been taken. This loophole allow the sale of counterfeit parts to persist without warnings in the feedback system. It is like this transaction never existed. The catch is that I can not provide any feedback now on eBay. The buyer may not sell the item on eBay or elsewhere." I got the refund, from the seller, very quickly.
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