This quote is form 2015. Wondering if people have been using Multicomp semiconductors and if they are good. I've purchased various Multicomp parts with no issues, but have not used their semiconductors..
I *think* they're a second-tier second-source. (Which would still be a damn sight better than a fake.)
My experience with other second-tier second-sources (Comset and Central Semi) is that their failure rate is a bit higher and that their parts measure less consistently, but still within spec.
My experience with other second-tier second-sources (Comset and Central Semi) is that their failure rate is a bit higher and that their parts measure less consistently, but still within spec.
Multicomp gets their stuff from several sources. For Motorola/On power transistors, they get them from Mospec. Mospec has been around for long time. They may not always be as good as a real ON Semi device, but they will meet the original spec. Original Motorola/On will often exceed the spec. I’ve blown Mospec devices running them beyond ratings, where the old NOS Motorola’s will hold up. Of course you’re not supposed to do that. I’ve cracked a lot of them open over the years, and the die sizes are comparable to the originals and they do have a proper internal heat spreader.
Used Old Stock
I was looking for some power BJT for my experiment with Nelson Pass's New Stasis. I was thinking of the 2SA1943/2SC5200 when I bumped into these "Dismantling original 10PCS 2SA1302+10PCS 2SC3281 A1302 C3281" on Ali for 20 bucks a bag. I was curious, so I ordered 2 bags and received them fast.
They look a bit rough, of course, they're pull's, but they appear to be genuine. They all test good, and I was able to cook up 3 complementary triplets (3x3x2) with a Vbe match of about 1% and Hfe match of 4% by playing with the driver.
A interesting alternative.
I was looking for some power BJT for my experiment with Nelson Pass's New Stasis. I was thinking of the 2SA1943/2SC5200 when I bumped into these "Dismantling original 10PCS 2SA1302+10PCS 2SC3281 A1302 C3281" on Ali for 20 bucks a bag. I was curious, so I ordered 2 bags and received them fast.
They look a bit rough, of course, they're pull's, but they appear to be genuine. They all test good, and I was able to cook up 3 complementary triplets (3x3x2) with a Vbe match of about 1% and Hfe match of 4% by playing with the driver.
A interesting alternative.
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It could probably be a good deal if the seller didn't charge more than $40 USD for shipping in an $18 USD product...
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Hi jfetter,
Destroy the fakes before they creep into your projects. I know it seems like a waste, but without knowing what they really are all you have is a bag of liabilities.
The mallet is strangely therapeutic. Give it a try. Not unless you have a vise and want to see if you can squeeze any electrons out.
-Chris
AKA Widlarizing the component.
Bob Widlar - Wikipedia
Perhaps look at Ti TL783?
https://www.ti.com/product/TL783?qgpn=tl783
What is the application? (Product name/model?)
https://www.ti.com/product/TL783?qgpn=tl783
What is the application? (Product name/model?)
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FQA12P20 / FQA19N20 - real or fake?
I have found some FQA12P20 / FQA19N20 at a small german diy electronics shop. They might be NOS or fake - i don't know yet. Problem ist that i got no proven-to-be-original devices for reference. I attached pictures of them.
I also measured them with my Mega328. N-Channel devices show a Vt of 4.5V, P-Channel devices measured Vt is ~3V.
What do you think about this transistors? Possibly real or most likely fake?
I have found some FQA12P20 / FQA19N20 at a small german diy electronics shop. They might be NOS or fake - i don't know yet. Problem ist that i got no proven-to-be-original devices for reference. I attached pictures of them.
I also measured them with my Mega328. N-Channel devices show a Vt of 4.5V, P-Channel devices measured Vt is ~3V.
What do you think about this transistors? Possibly real or most likely fake?
