The K250R1000 with 220V 1A 5A 4W -40?~+85? 2A 0.28O 10s 0.77O radial leaded, P=5.1mm resettable fuse ROHS manufactured by Kailong is a single use electronic component. It is a type of fuse consisting of a heat- sensitive, cylindrical element made of metal wire and ceramic, which is encapsulated in a plastic housing. It is designed to control the current flow in an electric circuit and protect it from severe overloading or short-circuiting. It is rated at 1 Amp, 5 Amp, and 4 Watt, is capable of withstanding temperature range of -40?~+85?, has a resistance rate of 0.28O, a time rating of 10s and a resistance rate of 0.77O. The radial leaded component fits inside a P=5.1 mm space and is RoHS compliant.