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Old 16th February 2013, 08:23 AM   #1
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Default Mos-Fets replacement

Hi,

I'm currently repairing a Yamaha YST-SW800 subwoofer and have found some of the Mos-Fets to be dead but am unable to locate the ones that i require.
This is what the service manual says and the parts that i need-

Q16- V5877200- FET- 2SK2378
Q18- V5877200- FET- 2SK2378
Q19- V5877000- FET- 2SJ406

Are there alternatives to these?
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Old 16th February 2013, 09:25 AM   #2
pergo is offline pergo  Italy
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2SK2378 ---> IRF640
2SJ406 --> IRF9640

for the IRF640, choose the non-N version or the -A version (IRF640 or IRF640A, not the IRF640N)
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Old 16th February 2013, 09:40 AM   #3
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HI,

Brillaint thank you, have found the IRF9640 but all the IRF640 seem to be N-Channel although have found a IRF640A so think might be in luck.

Thanks
Jake
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Old 16th February 2013, 09:43 AM   #4
pergo is offline pergo  Italy
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you can also use FQP19N20 & FQP12P20
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