Insulating Pads

Nikon1975 · 12th June 2010, 04:15 PM

Simple question: how much do you trust insulating pads ? I mean would you mount on an exposed heatsink chip that carries 450 V ?

Thanks,

Davide

Zero Cool · 12th June 2010, 04:19 PM

they make ceramic insulating pads for HV applications.

nigelwright7557 · 12th June 2010, 10:33 PM

They usually work very well.

The only time I have had a problem is with swarf getting into the mix and that is disasterous for the amp. I now always do a multimeter check between drain and heatsink for shorts before powering up.

I had a bit of swarf once stuck in the insulator and couldnt see it, replacing the insulator cured the problem. It was definitely swarf because the multimeter measured a short.

mickeymoose · 13th June 2010, 01:23 PM

Berquist silpad 400 (9mil) is rated at 4500 VAC breakdown voltage with excellent thermal conductivity. Quite expensive though. E

12th June 2010, 04:15 PM	#1
Nikon1975 diyAudio Member Join Date: Nov 2009 Location: Tokyo	Insulating Pads Simple question: how much do you trust insulating pads ? I mean would you mount on an exposed heatsink chip that carries 450 V ? Thanks, Davide

12th June 2010, 10:33 PM	#3
nigelwright7557 diyAudio Member Join Date: Apr 2008 Location: Carlisle, England	They usually work very well. The only time I have had a problem is with swarf getting into the mix and that is disasterous for the amp. I now always do a multimeter check between drain and heatsink for shorts before powering up. I had a bit of swarf once stuck in the insulator and couldnt see it, replacing the insulator cured the problem. It was definitely swarf because the multimeter measured a short. __________________ http://www.murtonpikesystems.co.uk PCBCAD40 pcb design software.

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12th June 2010, 04:19 PM	#2
Zero Cool Audio Junkie diyAudio Member Join Date: Sep 2004 Location: MN	they make ceramic insulating pads for HV applications.

13th June 2010, 01:23 PM	#4
mickeymoose diyAudio Member Join Date: Nov 2008	Berquist silpad 400 (9mil) is rated at 4500 VAC breakdown voltage with excellent thermal conductivity. Quite expensive though. E

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