I installed this fuse in my multimeter on the 10 amp ammeter circuit. I went to measure the current from my car battery while the car was "sleeping" but I got no reading at all (open circuit). So I pulled the fuse and checked. Unfortunately it was bad (no continuity, no resistance). I think they sent me a blown fuse and now I can't return it because I missed the return window. If you buy this, check it out right away.