The Littelfuse RF2637-000 is a resettable fuse, also known as a polymeric positive temperature coefficient (PPTC) device, designed to provide overcurrent protection in a variety of applications. This component is rated at 72V, 1.6A, and can safely handle up to 40A without triggering its internal fuses. It features a reset delay of up to 10ms, allowing the circuit to trip while still protecting the other components. It also features a quick-response time, allowing it to act as a fast-acting switch in the presence of an overcurrent condition. With its full-molded construction, the RF2637-000 is suitable for use in damp environments, and its rated temperature range of -40 °C to +85 °C ensures its reliability and durability over the long-term. Finally, this component is RoHS compliant, making it suitable for use in a variety of green design applications.