Bussmann Fuses 50A FRN-R Cartridge Fuse is a heavy-duty Fusetron dual element, time delay cartridge fuse designed specifically for motor protection. It effectively helps prevent motor burnout caused by overloads or single phasing. The time delay feature allows the initial startup surge typical of motors to pass through safely, while opening the circuit before burnout occurs during longer, dangerous overloads. This fuse is UL listed as Class R with a 200,000 AIR (amp interrupting rating), ensuring reliable performance. It is rated for 250V and features ferrule ends for 1/10A to 60A ratings, making it suitable for a wide range of applications. Model Number: 50A FRN-R