I have a bunch of Fotek SSRs, rated 385V / 40A. Well, that's what it says on the label.
Perhaps I have been hanging around with Americans too long, but I recently bought a bullet-casting melter. I wasn't happy with the temperature controller, so I modified it with a PID controller and SSR. https://photos.app.goo.gl/mq4NFtVtiSsVHFSk9 (A variant of that 1/32 DIN controller has a built-in 5A SSR, which might be an easier modification, but I used the relay / ssr driver version: https://www.ebay.co.uk/itm/193179699038 ) I measured the cold resistance of the element at 111ohms, so that's nominally 2A, or 3A if we allow for the actual peak mains voltage. So I figured that the 40A SSR should be fine. Imagine my surprise when it failed short-circuit almost immediately. It was potted up, and when I pulled it apart the actual driver chip fell apart, so no way to be sure what the actual rated current was now. The last one of these I took apart had a 10A driver, so that is what I have been mentally rating them at. Perhaps I was wrong. Possibly it's a fake 10A driver in a fake 40A SSR? If you are wondering why a resident of the UK wants a bullet mould, I have been making tiny glass-bottomed peter tankards: https://photos.app.goo.gl/RHmiUKG1BtCT5qW16 -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1912 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
