MF-RX135/72-2 is a PTC resettable fuse from Bourns' MF-RX/72 series designed for low-voltage power supply protection up to 72 V. This radial leaded device features a hold current (Ihold) of 1.35 A and a trip current (Itrip) of 2.70 A, with an initial resistance of 0.09 O at 23°C. The fuse exhibits a maximum time to trip of 8.0 seconds and tripped power dissipation of 1.90 W at 23°C, providing reliable overcurrent protection with automatic reset capability. The device is constructed with flame-retardant epoxy polymer insulation meeting UL 94 V-0 requirements, is RoHS compliant and halogen-free, and is commonly used in security systems, fire alarm systems, loudspeakers, and power transformer applications where resettable circuit protection is required.