Identify large stud-mount diode please

From: Pete (petebREMOVETHIS_at_clear.net.nz)
Date: 08/15/04 

Date: Sun, 15 Aug 2004 22:39:04 +1200

I have searched for specs through all the data manuals at my work and an
indepth with Google but no luck.

Coded PRX1210620200 anode=stud. There is no id of manufacturer but it could
be SEMIKRON. Dimensionally the measurement across the flats is 1.25" and the
thread section is diameter 0.75". This is a monster of a device.

Recovered from a massive old UPS (3 tons worth) that once ran the whole
building during cutover to generator.

I'm intersted in building an arc welder (MIG or TIG) with these once i know
the spec....

Thanks

Pete

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