If you read the datasheet, the 500 Ampere carry current rating is with 400 mcm (200mm2) conductors, basically very large busbars, to carry heat away from the terminals.
I have almost never seen this adhered to. I had a battery testing setup with 75mm2 cables and a pair of heatsinks and fan on the terminals. On Fri, 14 Jun 2024 at 17:36, Lee Hart via EV <ev@lists.evdl.org> wrote: > > John, these are all good suggestions for what might be causing the failures > (coil snubber, operating contacts under load, etc.) But have you done any > post-mortem on the failed contactors to see how they actually failed? > > Perhaps I missed it; but was it the coil or the contacts that failed? Are the > contacts welded closed, or burned open? You may have to cut it open to see. > > Lee > -- > Excellence does not require perfection. -- Henry James > -- > Lee A. Hart https://www.sunrise-ev.com > > _______________________________________________ > Address messages to ev@lists.evdl.org > No other addresses in TO and CC fields > HELP: http://www.evdl.org/help/ > -- Paul Compton www.paulcompton.co.uk (YouTube channel) _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
