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i won't buy chinise parts from aliexpress or ebay
Marco:
--- Quote from: cmrincon on February 11, 2020, 09:36:00 pm ---Do you have any mosfet suggestion?
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Use automotive rated parts, even if it's not on the datasheet they can't pass the tests without gate protection. I only found one through hole one, the BS107P.
I'm not sure how many versions of 2n700x without gate protection are even made any more, but Infineon says their one is ESD class 0 so it seems they are still being made.
exe:
An alternative could be an smd part with a through-hole adapter board if TH mounting absolutely needed. Or, may be, BJT would be a better option? We need to know more about the application...
SilverSolder:
--- Quote from: cmrincon on February 11, 2020, 09:36:00 pm ---
[...] Sometimes i'm bored and i buy things that i really don't need [...]
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Welcome to the club...
janoc:
--- Quote from: Marco on February 11, 2020, 07:03:36 pm ---
--- Quote from: cmrincon on February 11, 2020, 09:21:30 am ---Yesterday i was learning about mosfets amps and i decided to use a few 2n7000 N-channel mosfet which i got from aliexpress time ago.
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True 2n7000s are the most statically sensitive component a hobbyist will handle (but shouldn't). You can juggle PC memory made with the tiniest of modern processes without much fear, but look wrong at a 2n7000 and it's kaput.
Breadboarding with them is silly, use parts with proper gate protection.
PS. a lot of them have gate protection now regardless of the datasheet, but you might have some NOS of proper ones.
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Eh, they are OK, even on a breadboard if you are careful.
IMO, it is a good opportunity to learn and use proper ESD precautions, e.g. an antistatic mat on the workbench and make sure the gate is never left unprotected (e.g. with a resistor/zener/TVS diode) somewhere where a user can "zap" it (e.g. via a connector). There are plenty of much more common components that are as easy if not easier to kill and are in common use by hobbyists, such as many of the "neopixel" smart LEDs, laser diodes, some CMOS chips ... Should we avoid all of these too?
It is much better to learn this by frying a LED or an 2N7000 than a more expensive part, in my opinion.
Marco:
If there's Neopixel's with ICs without input protection you should definitely avoid them, there's no real excuse for that. Half century old CMOS ICs without input protection are curiosities you shouldn't be wasting on a practical circuit either. Junctions even of a laser diode aren't as vulnerable as a MOS gate, they can at least avalanche a little without damage.
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