IGBT Upgrade?

Trying to replace some a pair of IGBTs where one has burnt out.

Stock was - https://datasheet.octopart.com/CM75DU-12F-Mitsubishi-datasheet-10739441.pdf but its been discontinued. Mitsubishi says the recomended replacement is this one : https://www.mitsubishielectric.com/semiconductors/content/product/powermodule/igbt/t_series/cm100dy-13t_e.pdf

Looks like a 100 amp unit vs a 75 in the same physical form factor.... Can anyone tell me if it would work as a drop in replacement, or is there something I am missing? I'm not a a sparky by trade, and its far over my head.

That one looks like a winner to me. Beside voltage and current ratings, I looked at the gate charge and the new part is slightly lower, so the driver circuit will handle it fine. Physical size and layout I didn't check but with screw terminals it can't be too hard to make it fit.

That's kind of a big honker. What does it go to?

Thanks Fechter - a pair of these run 400 amp welder. If I go on the welding forums, I'd get responses like take it to a shop or buy parts from the dealer. I can get the IGBT's for 25 USD a piece - if I go to the mfg, I'm looking at closer to 400 for a set.

Cheers,

That one should work fine but I suggest replacing both so they are matched. You don't have much to lose by trying. If it doesn't work, you can always follow their advice.

Still looking for a replacement?

They are pretty abundant on eBay. Depending on the switching frequency you'd have no problem swapping it out for the 100 or 150A variant. Those bricks are pretty robust. Semikron also offers 75/100/145 amp versions in the exact same package. They are all identical dimensionally. Let me know if you need help finding one.