MF-R135-2 is a radial leaded PTC resettable fuse from Bourns designed to protect low-voltage power supplies and loads from overcurrent conditions. It features a hold current (Ihold) of 1.35 A and a trip current (Itrip) of 2.70 A, with a maximum voltage rating of 30 V and maximum current rating of 40 A. The device exhibits an initial resistance of 0.05 to 0.15 O at 23°C and a post-trip resistance of 0.17 O maximum, with a maximum time to trip of 6.75 seconds at 23°C. The fuse is constructed with cured, flame-retardant epoxy polymer insulation meeting UL 94V-0 requirements and is RoHS compliant and halogen-free. Common applications include computers, peripherals, general electronics, and automotive systems where automatic circuit protection and resettability are required.