The Littelfuse RXEF020-2 is a radial lead, resettable polymeric positive temperature coefficient (PPTC) fuse. It has a rated current of 0.2 Amps and a rated voltage of 72 volts, with a maximum interrupting current of 40 Amps. This fuse is designed to protect devices from potential damage caused by overcurrent or short-circuit conditions. The fuse will open when an overcurrent occurs and will reset itself to the off position when the overcurrent condition is removed. It is widely used in automotive, computer, consumer electronics, HVAC, industrial, lighting, medical, and telecommunications systems.