IRPF240 Replacement?

NV&H · 18th February 2005, 08:39 PM

Looks like Fairchild just came out with this. 200V, 19A. Input capacitance is only 65% of the IRPF240. Appears to have a much higher transconductance too.

I'm new at this, so I would appreciate someone looking at the datasheet link below and giving me your feedback. Would this thing work better in a SOZ than the 240?

http://www.fairchildsemi.com/ds/FQ%2FFQA19N20C.pdf

NV&H · 18th February 2005, 09:03 PM

OK, I put in the link for the FQA19N20 instead of the FQB.

The FQA has slightly higher current capacity and the same transconductance as the 240 but with 65% of the input capacitance. The FQB seems similar except for the much higher transconductance.

Sorry for the mixup.

Comments?

richie00boy · 18th February 2005, 09:07 PM

Well, I've just studied the datasheet for the FQA in your link and it looks good. Will drop right in to replace IRFP240. The only issue could be in switching circuits as rise/fall and Ton/off times are longer for the Fairchild part, but everything else looks better.

MikeW · 19th February 2005, 12:38 AM

They sound good. The Vgs is a little higher than the IRFP 240.
Can't get a 6-32 screw through them.

18th February 2005, 08:39 PM	#1
NV&H diyAudio Member Join Date: Feb 2005 Location: Charlotte, North Carolina	IRPF240 Replacement? Looks like Fairchild just came out with this. 200V, 19A. Input capacitance is only 65% of the IRPF240. Appears to have a much higher transconductance too. I'm new at this, so I would appreciate someone looking at the datasheet link below and giving me your feedback. Would this thing work better in a SOZ than the 240? http://www.fairchildsemi.com/ds/FQ%2FFQA19N20C.pdf __________________ NV&H

18th February 2005, 09:03 PM	#2
NV&H diyAudio Member Join Date: Feb 2005 Location: Charlotte, North Carolina	OK, I put in the link for the FQA19N20 instead of the FQB. The FQA has slightly higher current capacity and the same transconductance as the 240 but with 65% of the input capacitance. The FQB seems similar except for the much higher transconductance. Sorry for the mixup. Comments? __________________ NV&H

18th February 2005, 09:07 PM	#3
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Well, I've just studied the datasheet for the FQA in your link and it looks good. Will drop right in to replace IRFP240. The only issue could be in switching circuits as rise/fall and Ton/off times are longer for the Fairchild part, but everything else looks better. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

19th February 2005, 12:38 AM	#4
MikeW diyAudio Member Join Date: Sep 2002 Location: North of Boston	They sound good. The Vgs is a little higher than the IRFP 240. Can't get a 6-32 screw through them. __________________ MikeW

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