1 x NARVA 20 AMP MANUAL RESET CIRCUIT BREAKER P/N MODEL 55720 This circuit breaker will take the place of a standard blade fuse but with the advantage of being able to be reset , Ideal in applications where what is being connected could have a short circuit or a momentary short . These replace the standard blade fuse so you never have to replace them again. If you overload the circuit or have an electrical short these simply open to prevent the flow of power. When you think you have found the problem, press the RED reset button and its the same as replacing an old fuse. This is a much safer option than increasing the fuse rating that many people do or continuing to burn out fuses until they find the problem. SPECIFICATIONS These are 19mm wide and a total of 31mm high. Manual reset ATS circuit breakers , 20A , 10V - 32V.