MF-RX185/72-2 is a PTC resettable fuse designed for low-voltage power supply protection up to 72 V, featuring a hold current (Ihold) of 1.85 A and a trip current (Itrip) of 3.70 A. The device exhibits an initial resistance of 0.05 O at 23°C and a maximum 1-hour resistance of 0.13 O, with a maximum time to trip of 15.6 seconds at 23°C. It is constructed with radial leads, cured flame-retardant epoxy polymer insulation meeting UL 94 V-0 requirements, and is RoHS compliant and halogen-free. The MF-RX185/72-2 is ideal for protecting security and fire alarm systems, loudspeakers, and power transformers, offering resettable circuit protection that automatically restores functionality after a fault condition is cleared.