IRG4BC30UD IGBT Failures

richie00boy · 15th January 2010, 11:22 AM

We have had a number of failures over time of these IGBTs when used in PWM bridged motor drive and are wondering if there are any other users of these devices out there that could comment either way on their reliability. From the datasheet we seem to be well within their ratings.

Mooly · 15th January 2010, 11:44 AM

Aren't these devices prone to secondary breakdown in the same way as bjt's ?
I think you have to look carefully at the application, and whether the SOAR is being compromised.

Many IGBT's on offer here, which you've probably seen

extremely low prices. Check the semis bargain corner.
CPC | New product and manufacturers highlights

richie00boy · 06:09 PM

As I said, we are in compliance with the datasheet, including SOA.

You are right, some bargains on CPC at the moment. Hadn't looked at that page yet though so thanks.

15th January 2010, 11:22 AM	#1
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	IRG4BC30UD IGBT Failures We have had a number of failures over time of these IGBTs when used in PWM bridged motor drive and are wondering if there are any other users of these devices out there that could comment either way on their reliability. From the datasheet we seem to be well within their ratings. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

15th January 2010, 05:48 PM	#3
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	As I said, we are in compliance with the datasheet, including SOA. You are right, some bargains on CPC at the moment. Hadn't looked at that page yet though so thanks. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more Last edited by richie00boy; 15th January 2010 at 06:09 PM.

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15th January 2010, 11:44 AM	#2
Mooly diyAudio Member Join Date: Sep 2007	Aren't these devices prone to secondary breakdown in the same way as bjt's ? I think you have to look carefully at the application, and whether the SOAR is being compromised. Many IGBT's on offer here, which you've probably seen extremely low prices. Check the semis bargain corner. CPC \| New product and manufacturers highlights

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