Review on Enhanced 20A Resettable Fuse Circuit Breaker - Optimal Protection for Car Audio Systems 12V-24V DC by Michael Reddy

Set it in line with the battery and RC motor to shut it down when the current exceeds 40 amps. For a few days and stumbling a few times, the switch wouldn't turn back on. The switch closed but the circuit remained open. I ordered a replacement and the same thing happened on the second block. I believe the design of this device is not reliable enough to fire more than a few times before failing.