What diode should I use?

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AKnogood

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My father-in-law has an old soldering unit in his garage and he blew 2 diodes on the electronic board. I'm trying to find some replacement parts.

Here you can see a photo I took of the board.

I know the part number for the diode "A" is 1N4004 but I can't find the part number for the bigger diode "B". And there's no other diode of the same size on the board.

Any idea what diode I could use as a replacement for diode "B"? If you need any more info please let me know!
 

you can use the same 1N404 but note the polarity...

- - - Updated - - -

you can use the same 1N4004 but note the polarity...
 

The bigger diode has a number on it, some digits can't be seen in the photograph. If you can tell us what they are we can find it's ratings and suggest an alternative. I certainly wouldn't replace one with a 1N4004 and before doing anything else I would find out why the damage was cause in the first place.

Brian.
 


The even bigger diode on the left has "P60" and "8209" written on it. How could I find out why the damage was caused?
 

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