I have a broken Hypertherm max 20 from 1994. I have determined the problem lies in the chopper board assembly which is no longer available. So I must rebuild the one I have. Most of the components are available. But these 2 large diodes I can find no info on them.
Not having a schematic that shows the chopper, I don't know what kind of diodes these are or their function. The 2 diodes are the same, a TO-3 case with either 2 common anodes or 2 common cathodes. Made by I R markings 1RF350
8P3M
9343G
Can anyone help me with the ID of these diodes. Data sheet would be great. Since they are probably obsolete, a similar replacement diode if you know of one. And is it a common anode or cathode. Thanks in advance for reading and hopefully helping.
Have a pic of the diode with markings.
Not having a schematic that shows the chopper, I don't know what kind of diodes these are or their function. The 2 diodes are the same, a TO-3 case with either 2 common anodes or 2 common cathodes. Made by I R markings 1RF350
8P3M
9343G
Can anyone help me with the ID of these diodes. Data sheet would be great. Since they are probably obsolete, a similar replacement diode if you know of one. And is it a common anode or cathode. Thanks in advance for reading and hopefully helping.
Have a pic of the diode with markings.
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