One may have had alu bond wires, the other gold. The difference in thickness would then equate to identical performance. The transistor wafer hidden under the blob may be a lot thinner as well, leading to better heat dissipation in a smaller die and thus may actually be equivalent as well. Without seeing full characterization curves on both you cannot really call anything fake. Fun de-liding though!
@user-rw2fv8be7y
Жыл бұрын
The Motorola date code shows 0725...25th week of 2007. Motorola sold off the transistor business to ON sometime around August of 1999. Any date code much later than 9932 would likely be fake. There were probably a few made during the transistion with M logos on them, but I would have expected ON to have changed the printing fairly quickly in their production factories.
@TheRadiogeek
6 жыл бұрын
That cutting wheel worked really good on opening up the transistors. Nice job exposing the fakes.
@bigdog8008
6 жыл бұрын
Motorola counterfeit: Per Moto (On Semi rep) -- last date for parts with Motorola logo was 22 July 2000. Anything with a later date code is counterfeit. Motorola part in video shows 0725 for date code -- 25th week of 2007.
@mrtriac3024
6 жыл бұрын
Good point!
@JohnJones-oy3md
2 жыл бұрын
This.
@AB1Vampire
3 жыл бұрын
Just got 10 3772's from a US Amazon Seller. Paid about $14 including ship. Only 2 of them match. While they test as an NPNI, I would not buy again. Nice video, thanks
@DeadKoby
Жыл бұрын
For "obsolete" parts.........I many times end up going to NTE. I'd love to be able to get the OEM part, but once they are gone, all that is left are used and faked ones.
@RichmixLive
4 жыл бұрын
I use ON semi parts esp for 2N 3055 replacement. Nice demo!thx.
@darkgreen68
3 жыл бұрын
Great Video thank you, this looks like a transistor on my welder that I think is bad. I don't know how to identify it without any numbers on it. low power side and drive motor connects to it
@Pyridox
6 жыл бұрын
Wow, I guess we get what we pay for. I hear of a lot of counterfeit semiconductors being sold on ebay, a friend of mine bought a bunch of 555 timer IC's, and half of them were NG. The timer IC's had a Texas Instrument logo (kind of smudged). I have ordered from Digikey and also Newark element14.
@SevenFortyOne
6 жыл бұрын
I warned my friend about buying parts from eBay but he did it anyway...oh well we've all been burned one time or another. I sourced some quality parts from mouser for him and now his power supply is running good.
@treadmillrepair754
3 жыл бұрын
My first stop is Digikey or Newark if I can't find the parts in these sites I buy for a two trusted chinese sellers only. Best Regards.
@soundspark
2 жыл бұрын
If it's new and it's branded Motorola it's fake. A genuine would be a 2N3772G from On Semiconductor.
@rcfaudioitalia6110
Жыл бұрын
depends who makes them. I thought same thing for the 100V 10000uf capacitor, 8$ piece would be junk, but it was full of foil. Got surprised to be honest. Could stay stable at 90Volts.
@tvtech2582
6 жыл бұрын
I always buy from Mouser or DigiKey. Who would think that someone would counterfeit a device like an inexpensive transistor. It even has a real looking Motorola logo on it. Years ago this was never a concern. I have seen a lot of horror stories about E bay but this takes the cake ! Way back in the 70s I bought a lot of parts from Lafayette Radio Catalogs,Do you remember them ?
@SevenFortyOne
6 жыл бұрын
Layfayette was a little before my time. But a friend of mine worked there when he was in high school and often talks about how cool it was. We have one electronics parts store left here in CT but they are very expensive so I usually shop mouser, digi-key, or the scrap bin at work for parts.
@DandyDon1
5 жыл бұрын
@@SevenFortyOne The price of parts at a retail store is directly correlated to overhead. How big is their space, where are they located, how much is their Lease/Rent, utilities etc. All in all, if you can't make a profit then there's not much keeping one in business.
@carelminnaar8454
11 ай бұрын
All the transistors I've bought in the past from Aliexpress before turned out to be fakes or re-labeled mixed-batch parts.
@VoidHalo
4 жыл бұрын
Heh I've had fake 74HC595 shift registers from "TI" where the logo is a picture of the United States. I guess they didn't know what Texas is. They seem to work fine, though I only run them at a few hz and haven't had a chance to characterise them on a scope yet.
@monteceitomoocher
2 жыл бұрын
Needed some power devices for a tv restoration, i made sure the replacements were genuine 1980's old stock, even reputable suppliers can fall victim to this scam, just a warning as well, some transistors can contain beryllium which is nasty toxic stuff, beware!.
@henkholdingastate
Жыл бұрын
Happens a lot, special with expensive transistors
@kennethiman2691
3 жыл бұрын
Thank you.
@AB1Vampire
3 жыл бұрын
Got 10 from Amazon Seller marked "ON 2N3772 BM1542 MEX". Even worse than your fakes on the inside. The test numbers were all over the place but not enough to call them fake. Lasted not even a minute after a PS rebuild. I fused both the In & Out Voltage regulator board leads with 2 amp fuses and never connected a load to the PSU. They failed immediately!
@SevenFortyOne
3 жыл бұрын
Sorry to hear that...
@ZlayaCo6aka
6 жыл бұрын
On eBay, the proverbial "at least 99%" of people will only buy the lowest-priced item, (with "free shipping" of course,) so the only way legitimate sellers can sell ANYTHING is to price it similarly, BUT priced that way they can't make a profit, SO they don't bother... And then y'all wonder why you get counterfeit parts on eBay. (Duh.)
@SevenFortyOne
6 жыл бұрын
Yeah, I tried to warn my buddy about this but he wanted to try the eBay parts anyway...needless to say he won't make that mistake again.
@ZlayaCo6aka
6 жыл бұрын
The lesson is: "LOW PRICE" does-NOT-equal "GOOD" so DON'T search by "lowest price with free shipping" on eBay, and you might just find whatever little is left of the good stuff from the few respectable sellers remaining on eBay. Neither eBay nor ANY of the sellers are the problem, not even the scam-sellers; the problem is the buyers on eBay, who would much rather savor the high cost of low price, with "free shipping" of course!
@redoverdrivetheunstoppable4637
5 жыл бұрын
@@ZlayaCo6aka honestly i tried buying from an higher priced seller (again from china) and the results were the same... fakes if ppl really want genuine parts (or at least legit) they should buy from reputable sellers of course... pushing the price is the usual principle: "you want to pay more blindly? so you're naive by default, and they'll probably scam you" a friend bought in italy (i'm italian) spare parts more aimed to old radios (high voltage caps and potentiometers) and they were pretty junky as well, but at least not showing off top brands
@SureshKumar-nk2ok
4 жыл бұрын
thank u sir
@abeditani8293
5 жыл бұрын
The original 3055 have a coper hard inside
@ilhemedu31
Жыл бұрын
it is not counterfeit from the manufacturers but the traders who have a stock of unsold T03.. they mark the TO3 by a name which is in high demand.. 😂🇩🇿
@redoverdrivetheunstoppable4637
5 жыл бұрын
outrageous stories: IRF510 (bottom end mosfet) showing X10 the capacity on the gate, they just drop in surplus wafers, even if they are bigger 1N5711 or 1N6263 are instead random semi-power schottkyes (bigger, yes, but not valid for radio frequencies) BC639 - BCX56 etc ... they don't exist!!!, they all are BC337 - 2N2222A level LM311 (single comparator) it's instead a DUAL OP AMP!!! (almost all op amps are LM358 instead) LM35 is instead LM335 (maybe better????) why they have a lot of positive feedbacks? because a kid or novice or someone that is not testing the device right now will be happy with what they got, infact modules are very often good, they are easy to try why i keep buying? (not tansistors or common "feature" chips anymore) because the price is unbelivably low and i don't need a single transistor for a single project, i need a supply of generics (cheap hobby at the end) why they do that?... i dunno... instead of selling fakes 1€ a bag they could sell em 1.5€ a bag and not write fancy brands on em, they are just "legit parts".... INFACT!!! chinese appliances quite often don't have branded components and they are good P.S. SMT parts and weirdos seem to be ok (or better) most of the times (clever uh? competent people are more likely to test em)
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