Rectifier question

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Yes..

1 of them is MUR1620CTA arrows are pointing outward..

Other one is marked UF1620CT arrows pointing inward..

I have MUR1620C's and FEP16DTA on hand

Wondering if they will work in place of the orginals and if so which one is what?
 
Got amp with blown diode rectifiers MUR3040
The thing is that i cant any suitable replacements with 30A @ 400V and TO-220 case. Could be that amperage is overrated for this manufacturer? As its 30A and TO220 case.

MUR3040CTR Datasheet(PDF) - Thinki Semiconductor Co., Ltd.

Because they don't specify I'm going to assume 30a gross. That means 2 x 15a. The datasheet you linked is for the common anode. Assuming that's correct you could try:

SDURF3040CTR


You'll notice the datasheet for that actually states 15 per leg, 30 gross. Good luck!