this is my first post. I'm having a real pain trying to get these little solid state relays to work for me. This is a DC/DC relay.
I have now blown 2 and theyre 75 bucks a pop and I reallllllly dont intend to blow another. I cannot figure out what I'm doing wrong. My circuit seems to follow the data sheet, and in fact, the relay works for an operation or two, but after a while, the things latch shut and go completely kaput as far as I can tell. The indicator light still works normally when I open and close the control switch but regardless, the main line stays latched and I've verified that it remains latched even when completely removed from the circuit.
I'm using appropriate precautions, I even have a 30A fuse in series and the relay itself is rated at 30A! The data suggests a diode but my loads are DC only so I'm not sure it's necessary. Some insight would be greatly appreciated.
Additionally, does anyone have a better solution than expensive SSR's to this problem? I need to switch a 36V power supply at roughly 20A continuous power. This is for an EV so power efficiency is a concern and so is space. Obviously my plan to use SSR's hasnt been working great so far. Here's an image of my circuit side-by-side the data sheet suggested circuit.
THIS RELAY IS DCDC