MF-R250-0-10-99 is a radial-leaded PTC resettable fuse designed for automatic circuit 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 2.5 A and a trip current (Itrip) of 0.025 A at 23°C. The device exhibits an initial resistance of 0.048 O and a post-trip resistance of 0.07 O maximum, with a maximum time to trip of 10.3 seconds and typical tripped power dissipation of 1.20 W. The component is constructed with cured, flame-retardant epoxy polymer insulation meeting UL 94V-0 requirements, is RoHS compliant and halogen-free, and operates reliably across a temperature range of -40°C to +85°C. It is commonly used in computers, peripherals, and general electronics where automatic load protection is required.