"Sometimes you have to trim the prefix ..."

I've done all of that, but I think that is what got us to the notion of it being an SBR.
I can find no evidence that the MUR series was ever popular and most of the parts Mota produced disappeared quite quickly. I've used some of the low-current axial types. The FEPxxxx series from Vishay (originally General Instrument) would be suitable if the original is in a plastic package. I have a couple hundred in assorted voltages in TO-247 kicking around.

The C in the part number suggests "commercial" specs, so the military wouldn't use them in any case. I suspect General Semi and IR had most of the military market cornered. Mota did have mil qualified diodes but almost all were JEDEC registered numbers.

bertus's post at #9 seems the most plausible at this time. We really need the TS to post a pic or at least describe the part.

The European system had 2 & 3 letter prefix to indicate commercial or industrial application - no one ever took much notice of that.

If it complies with mil spec - the military are open to use it.

 

As per posts #2,3

Dual diode in a Common Cathode T0220.

 

Hello,

Can you post a picture of the diode?
There are several types that are called MUR2540.
The ones shown by the others are dual diodes in a TO220 housing, but there are also studded single diodes with the same number:
http://www.datasheet4u.com/datasheet-pdf/MCC/MUR2540/pdf.php?id=1125776

Bertus

Yes, you are right, it is actually a double diode type facing it other. Am sorry, my family misplaced it where I kept it. However, there is another by the side of the bad one that read T218 (MUR2540CT)
I want to say a very big thanks to you all for your kind response and for accommodating me. I will search for the bad one and update you if I find it. I have also attached a picture of the panel.

 

You can find one in a old psu from computer

 

Hello,

On the shown heatsink I see a MUR3020PT.
Here is the ON datasheet.

Bertus

 

ok. i got some at home, will check when i get back. Thanks