when it comes to installing mosfets on a heat zinc what works better a single screw or 2 screw holes on each side and clamping it down.i wana try clamping it i just dont want to wast my time
if it does not work help
thanks......🙄
if it does not work help
thanks......🙄
Mounting the Mosfets as they were designed is pretty
adequate. I don't know of any manufacturer specifying
otherwise, and you could conceivably run into loss of seal
between the plastic and metal.
adequate. I don't know of any manufacturer specifying
otherwise, and you could conceivably run into loss of seal
between the plastic and metal.
I like the clamp method because then the mosfet doesn't tend to pull down one end and lift up the other end. The force is more even over the whole of the back of the fet.
/Circlotron - not wanting to contradict Nelson Pass, quickly edits his posting. 😱
For high voltage use it is often necessary to use a clamp to get the required creepage distance. If you are not going to work the fet too hard then using the hole is ok. For maximum thermal transfer I still like a clamp though because you can get the pressure right over the die area of the fet.
/Circlotron - not wanting to contradict Nelson Pass, quickly edits his posting. 😱
For high voltage use it is often necessary to use a clamp to get the required creepage distance. If you are not going to work the fet too hard then using the hole is ok. For maximum thermal transfer I still like a clamp though because you can get the pressure right over the die area of the fet.
Contradict at will 😎
I personally like the aesthetics of the clamp approach, but I think that when you reach the point where you need that "extra thermal transfer" you're probably already on thin ice.
pass/ - likes to stay within 25 watts on 150 watt devices
I personally like the aesthetics of the clamp approach, but I think that when you reach the point where you need that "extra thermal transfer" you're probably already on thin ice.
pass/ - likes to stay within 25 watts on 150 watt devices
mossfets
i have one screw so ill leave it. wow zen amps run supper hot
whats the life span of a mosfet at this heat? and if i hose a mosfet
will it take the pcb with it?
i have one screw so ill leave it. wow zen amps run supper hot
whats the life span of a mosfet at this heat? and if i hose a mosfet
will it take the pcb with it?
hmm
i dont have a tester but if i ground myself and then touch the fet its to hot to keep my finger on
i dont have a tester but if i ground myself and then touch the fet its to hot to keep my finger on
heatrzinc
ya heatzinc is not super hot just the fet.
i got it i tryed torqueing it down and some better goop
thanks.......
ps the war has started🙁
ya heatzinc is not super hot just the fet.
i got it i tryed torqueing it down and some better goop
thanks.......
ps the war has started🙁
What kind of insulating pad are you using? The white, aluminum oxide one? You have to use thermal paste with it.
insulater
i used theme on the zen i got from you
i made another one
. all i had was
mica insulaters. oxide is better ill need to pick some up🙂
i used theme on the zen i got from you
i made another one
. all i had wasmica insulaters. oxide is better ill need to pick some up🙂
Different thermal pastes can do considerable difference too.. I always use arctic silver III, and theres a 5 to 10 degrees celsius difference between arctic silver III and standart white thermal paste..
The price is around $10 cdn in any pc store.
The price is around $10 cdn in any pc store.
Ilianh said:
Hi Ilianh,
I can confirm this. It is no publicity humbug.
When I changed from ordinary white grease to this arctic silver 3 stuff, the tem of my AMD Athlon processor decreased with 8 degrees!
You can often get it at better computerstores. Use only very little.
Regards,
Lucas.
Info about Arctic silver 3 :
Thermal conductivity: >9.0 W/m°K (Hot Wire Method Per MIL-C-47113)
Thermal Resistance: <0.0024°C-in²/Watt (0.001 inch layer)
Extended temperature limits: – 40°C to >180°C
4 to 15 degrees centigrade lower CPU core temperatures than standard thermal compounds or thermal pads.
When measured with a calibrated thermal diode imbedded in the CPU core.
Negligible electrical conductivity.
Arctic Silver 3 was formulated to conduct heat, not electricity. It is only electrically conductive in a thin layer under extreme compression.
(While much safer than electrically conductive silver and copper greases, Arctic Silver 3 should be kept away from electrical traces, pins, and leads. The compound is slightly capacitive and could potentially cause problems if it bridged two close-proximity electrical paths.)
Thermal conductivity: >9.0 W/m°K (Hot Wire Method Per MIL-C-47113)
Thermal Resistance: <0.0024°C-in²/Watt (0.001 inch layer)
Extended temperature limits: – 40°C to >180°C
4 to 15 degrees centigrade lower CPU core temperatures than standard thermal compounds or thermal pads.
When measured with a calibrated thermal diode imbedded in the CPU core.
Negligible electrical conductivity.
Arctic Silver 3 was formulated to conduct heat, not electricity. It is only electrically conductive in a thin layer under extreme compression.
(While much safer than electrically conductive silver and copper greases, Arctic Silver 3 should be kept away from electrical traces, pins, and leads. The compound is slightly capacitive and could potentially cause problems if it bridged two close-proximity electrical paths.)
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