MF-R090 is a radial-leaded PTC resettable fuse designed for low-voltage power supply protection in consumer electronics and general applications. It features a maximum voltage rating of 30 V and a maximum current rating of 40 A, with a hold current (Ihold) of 0.90 A and a trip current (Itrip) of 1.80 A at 23°C. The device exhibits an initial resistance of 0.31 O and a post-trip resistance of 0.47 O maximum, with a maximum time to trip of 7.2 seconds and typical tripped power dissipation of 1.00 W. Constructed with flame-retardant epoxy polymer insulation meeting UL 94V-0 requirements, the MF-R090 is RoHS compliant and halogen-free, making it suitable for computers, peripherals, and general electronics requiring automatic overcurrent protection.