MF-RX012/250-2-2 is a fast-trip resettable PTC (Polymeric Positive Temperature Coefficient) fuse designed for telecom and customer premise equipment protection. The device features a maximum operating voltage of 60 V DC with 250 Vrms maximum interrupt rating, a hold current of 0.12 A at 23°C, and a trip current of 0.24 A. Initial resistance ranges from 8.0 to 10.5 ohms at 23°C, with one-hour post-trip resistance reaching a maximum of 16.0 ohms. The device trips within 2.5 seconds at 1.0 A and is housed in a radial leaded package with Sn/Cu plated leads. This resettable fuse is ideal for protecting telecom infrastructure, central office equipment, and access equipment against overcurrent conditions while meeting ITU-T K.20/K.21/K.45 and Telcordia GR-1089-C standards.