I'm looking for a BEEFY bridge rectifier to give me DC capabilities on my Oxford stick welder - peak current 500Amps average perhaps 200 when running. Although the voltage is relatively low (80vAC) there will be loads of high voltage spikes no doubt - other bridges I've seen in MIG and TIG sets are rated at 800 or 1200 peak inverse.
Anyone got anything kicking arround - or 4 humungous diodes ??
(no four 1N4007's won't work )
AWEM
i could do you at least 100 1N4007's if that would help lol... but sorry to say i am unable to help otherwise, from what i know about bridge rectifiers, which is very little, i would say you are on to a difficult one
We have four Westinghouse 710M21 / 710MR20 series diodes, all new in makers packaging, 5000A peak 1/2 cycle surge current at 60Hz, not sure of the vrrm though, these were probably plating rectifiers 275A in single-phase configuration.
The data sheet that is with them is for the 1N404X series, mechanically identical to the Westinghouse types. 3/4-16 UNF mounting....
I've asked a friend in Westinghouse if he can ID the vrrm for me.
These are 1969 manufacture BTW....:-))
Peter
RS part number 395-9220 is rated 600A but a bit pricey at £70 a pop.
183-8086 is a bit more reasonable - 400A and only 21 quid each.Regards, Tony
Peter,
Is there ANYTHING that you don't have tucked away Sounds very interesting - (anyone got any 3/4" unf nuts )
If the PIV is high enough I'm in hand bitting off mode !!!!
Andrew
Years of accumulation!
Fitting hardware is included, nut, locknut and washer.....
I don't think they will be high voltage types, although the generic range goes up to 1000V vrrm, my guess is they will be 100V or less :-((
Peter
Peter,
Did you ever hear from your contact with the data one these diodes?
Regards,
Andrew
Nope :-((
I also put a post on sci.electronics.components with no results so far...
Peter
PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.