mosfet failure

jrenkin · 3rd January 2012, 12:29 AM

How would one know if they had a mosfet fail?

nigelwright7557 · 3rd January 2012, 12:36 AM

Quite often they go short circuit from drain to source.
Check it with a multimeter on the ohms setting.

I have seen a gate to source short as well but only once.

jrenkin · 3rd January 2012, 06:15 PM

thank you

jrenkin · 6th January 2012, 06:19 PM

I measure 17K ohms across the d-s for a disconnected never used 2sk3563, the same as my used ones, when disconnected. Does that seem right?

rknize · 6th January 2012, 06:39 PM

Google for it. There are a few simple techniques to test the gates.

3rd January 2012, 12:29 AM	#1
jrenkin diyAudio Member Join Date: Nov 2007 Location: Denver, Colorado	mosfet failure How would one know if they had a mosfet fail?

3rd January 2012, 12:36 AM	#2
nigelwright7557 diyAudio Member Join Date: Apr 2008 Location: Carlisle, England	Quite often they go short circuit from drain to source. Check it with a multimeter on the ohms setting. I have seen a gate to source short as well but only once. __________________ http://www.murtonpikesystems.co.uk PCBCAD40 pcb design software.

6th January 2012, 06:39 PM	#5
rknize diyAudio Member Join Date: Feb 2009 Location: Chicagoland	Google for it. There are a few simple techniques to test the gates. __________________ Russ http://www.knizefamily.net/russ/cate...ics/tubeaudio/

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3rd January 2012, 06:15 PM	#3
jrenkin diyAudio Member Join Date: Nov 2007 Location: Denver, Colorado	thank you

6th January 2012, 06:19 PM	#4
jrenkin diyAudio Member Join Date: Nov 2007 Location: Denver, Colorado	I measure 17K ohms across the d-s for a disconnected never used 2sk3563, the same as my used ones, when disconnected. Does that seem right?

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