This is an 1812 size PTC Resettable Fuse manufactured by Jinrui Electronic Materials. It is typically used in a variety of electronic applications to prevent current overloads and short circuits. The JK-mSMD075-33 model is RoHS compliant, and features a maximum current rating of 75A, a maximum voltage rating of 30V, and a reaction time of less than 20 milliseconds. The fuse can be reset manually in the event of an overload or short circuit.