MF-RX250/72-AP is a radial-leaded PTC resettable fuse designed for circuit protection in low-voltage power supplies up to 72 V. It features a hold current (Ihold) of 2.5 A and a trip current (Itrip) of 5.0 A, with an initial resistance of 0.04 O at 23 °C. The device is constructed with flame-retardant epoxy polymer insulation meeting UL 94 V-0 requirements and is RoHS compliant and halogen-free. It operates reliably across a temperature range of -40 °C to +85 °C with a maximum device surface temperature of 125 °C in the tripped state. Common applications include security and fire alarm systems, loudspeakers, and power transformers where automatic circuit protection and resettability are required.