The JSMD1210-450L/12V is a resettable fuse manufactured by Jinkaisheng, with a rated voltage of 12V, a current rating of 4.5A, a power rating of 1.4W, and a rated impedance of 0.001O. This fuse has a trip-threshold of 50A, 2s delay, 0.013O resistance, and is RoHS compliant. This fuse is designed for such purpose as a resetting fuse for inrush current or over-current protection in a range of application including telecommunications, computer system, electrical appliances, and other electronic processes.