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November 3rd, 2008, 19:04 | #1 |
IronOverlord
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Normal for FET to heat up?
I was wondering if it is normal for a FET to heat up?
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November 3rd, 2008, 19:05 | #2 |
Yes.
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Age verifier Northern Alberta Democracy is two wolves and a sheep discussing what's for dinner. Freedom is the wolves limping away while the sheep reloads. Never confuse freedom with democracy. |
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November 3rd, 2008, 19:15 | #3 |
IronOverlord
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Thanks MacGuyver, I figured it was normal, can it it overheat if something is wrong? what can cause one to fry out?
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November 3rd, 2008, 19:18 | #4 |
Water for one thing.
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November 3rd, 2008, 19:19 | #5 |
Overheating to the point of melting is bad.. Other than that it will be fine. Caused by too much current/voltage
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I love freedom and consequently America |
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November 3rd, 2008, 19:19 | #6 | |
Quote:
There are a thousand ways to kill a FET. They are actually quite delicate, and can be killed by heat, over/under voltage, stray static discharge, etc.
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Age verifier Northern Alberta Democracy is two wolves and a sheep discussing what's for dinner. Freedom is the wolves limping away while the sheep reloads. Never confuse freedom with democracy. |
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November 3rd, 2008, 19:21 | #7 |
If it's a Mosfet it will have a thermal shut down so it does no pop,but you I guess it depends on what it's in and whats it doing? Is it a Drive transistor? They usally run on the warm side.Fans are your friend,keeping them cool helps them live longer
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Death Before Dishonor" Bleeding Black Label" |
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November 3rd, 2008, 19:24 | #8 |
Most mosfets don't have a thermal protection system. They just pop. I've replaced one or 2 that could have benefitted by that.
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Age verifier Northern Alberta Democracy is two wolves and a sheep discussing what's for dinner. Freedom is the wolves limping away while the sheep reloads. Never confuse freedom with democracy. |
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November 3rd, 2008, 19:28 | #9 |
since we are on the subject. Can you hook up mosfets in paralle?
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November 3rd, 2008, 19:30 | #10 |
Yes, but there are different requirements for AC and DC.
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Age verifier Northern Alberta Democracy is two wolves and a sheep discussing what's for dinner. Freedom is the wolves limping away while the sheep reloads. Never confuse freedom with democracy. |
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November 3rd, 2008, 19:52 | #11 |
IronOverlord
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Water , hahaha yeah don't it get wet. hahaha Thanks for the input guys. Just doing some studying on FETs.
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November 4th, 2008, 15:25 | #12 |
The Trigger Master has thermal shutdown, but it is controlled by the microcontroller, not the FET itself.
Usually, all the limits/rating of any electronic part is listed in the datasheet. The FETs I am installing as a trigger switch replacement are rated for 110A continuous current and 350A pulsed. They can run from -40 to 175 degC. And they have a built-in diode to prevent EM spikes from burning the FET. Still, I saw some burn by missuse, moisture/water, phisical shock etc. They are sensitive parts, and they are supposed to heat a little bit. Nothing electric is 100% efficient (yet), so there HAS to been heat generated somewhere. |
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