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Pico fuse to protect reverse power

PostPosted: Thu Sep 12, 2019 3:33 am
by TomMynar
I've blown several of the 5V 1A regulators with a power supply connection that was reversed :oops: . If I were to place a 2A 125V pico fuse in front of the regulator would that protect my circuit ? Or would the fuse be too slow to work ?

Thanks
Tom

Re: Pico fuse to protect reverse power

PostPosted: Thu Sep 12, 2019 3:19 pm
by Daniel
I actually don't know. The only way to know is to try and that is not very viable if you have to pay for the modules.

If the module dies because of current through the substrate diode in the IC there's a reasonable chance that a fuse can protect the module.