MF-R090-2 is a radial-leaded PTC resettable fuse designed for overcurrent protection in low-voltage power supply 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 has an initial resistance of 0.31 O and a post-trip resistance of 0.47 O (maximum at 23°C), with a maximum time to trip of 7.2 seconds. The component is constructed with cured, flame-retardant epoxy polymer insulation meeting UL 94V-0 requirements and is RoHS compliant and halogen-free. It is commonly used in computers, peripherals, and general electronics where automatic circuit protection and resettability are required.