CMF-RL55-0 is a radial leaded telecom CPTC resettable fuse designed for secondary overcurrent protection in telecommunications equipment. It features a rated resistance of 55 ohms with ±20% tolerance, a rated voltage of 220 volts, and a trip current of 0.065 amps at 25°C. The device operates over a temperature range of -40°C to +125°C and withstands induction voltages up to 600 VAC, meeting compliance standards including ITU-T K.20/21/45, Telcordia GR-1089-CORE, and UL 60950. This resettable fuse is commonly used in Customer Premise Equipment (CPE), Central Office (CO), and access equipment applications where reliable overcurrent protection and automatic reset capability are required.