MF-R020-2-99 is a radial-leaded PTC resettable fuse designed for low-voltage power supply protection in electronic applications. It features a maximum voltage rating of 60 V and maximum current rating of 40 A, with a hold current (Ihold) of 0.20 A and trip current (Itrip) of 0.40 A at 23°C. The device exhibits an initial resistance of 2.84 O and a post-trip resistance of 4.40 O (maximum at 23°C), with a maximum time to trip of 2.2 seconds. The component is housed in a radial leaded package with Sn/CuFe lead material, body dimensions of 7.4 mm × 15.7 mm, and meets UL 94V-0 flame retardant requirements. This device is RoHS compliant and halogen-free, making it suitable for computers, peripherals, and general electronics requiring automatic overcurrent protection.