Alternative to HEXFRED in SSE?

[hartze11]

Both of my preferred suppliers are out of the Vishay HFA06TB120, with long lead times.

It looks like STTH1512 from STMicroelectronics looks similar, a 1200 PIV TO-220 fast recovery diode:

https://www.alliedelec.com/search/pr...px?SKU=2480876

Will that work? Any other suggestions (other than using the 5AR4)? ;-)

Thanks,

Dave

[rknize]

You don't want either of those, really. Get the Fairchild Stealth Diode ISL9R8120P2 from Mouser.

[hartze11]

Originally Posted by rknize

You don't want either of those, really. Get the Fairchild Stealth Diode ISL9R8120P2 from Mouser.

So what are the key attributes we're looking for in a solid-state rectifier for the SSE?

[rknize]

Avalanche breakdown voltage.

[stripe157]

Originally Posted by rknize

You don't want either of those, really. Get the Fairchild Stealth Diode ISL9R8120P2 from Mouser.

Is this part intended to be used in D1 and D2 on the board? This is what I thought the HexFREDs were.

Or is the part number the currently recommended replacement part for the CCS ICs that go into U10 and U20 on the board?

I'm confused because I've been unable to find a recommended replacement for the FREDs (D1 and D2) that have two prongs unlike the Fairchild part number listed above that has three prongs like one would use for the CCS ICs at U10 and U20.

I've I used the IXYS part from digi-key (part #: IXCP10M45S-ND) for U10 and U20. Should I replace this part before I finish wiring up my board?

Thanks a lot for the time you guys spend answering questions and getting everyone else's amps up and running, this forum is the reason I decided to go with George's board as a starting point for my project as opposed to attempting a simple point to point. I only have one more week of so before my edcores get here and I can get this thing finished!

Thanks again,