The MF-NSMF020-2 is a 0.5A surface mountable PTC Resettable Fuse. Compact design to save board space - 0603 footprint. Small size results in very fast time to react to fault events. The MF-FSMF series PTC Resettable Fuse for USB port protection, HDMI 1.4 source protection, PC motherboards - plug and play protection, mobile phones - battery and port protection and PDAs/digital cameras. Operating temperature ranges from -40°C to +85°C.