MF-R010-AP-99 is a PTC (Positive Temperature Coefficient) resettable fuse from Bourns' MF-R Series, engineered to protect low-voltage power supplies and loads in electronic applications. This radial-leaded device features a maximum voltage rating of 60 V and maximum current rating of 40 A, with a hold current (Ihold) of 0.10 A and trip current (Itrip) of 0.20 A at 23°C. The device exhibits an initial resistance of 4.50 O and a post-trip resistance of 7.50 O (maximum at 23°C), with a maximum time to trip of 4.0 seconds. The fuse is constructed with cured, flame-retardant epoxy polymer insulation meeting UL 94V-0 requirements, is RoHS compliant, and halogen-free. It is commonly used in computers, peripherals, and general electronics where reliable overcurrent protection is essential.