Co. LtdThe JK-SMD1210-300L is a resettable fuse manufactured by Jinrui Electronic Materials Co. Ltd. It has a rated voltage of 6V and a rated current of 3A, an overload current of 50A, a power dissipation of 800mW, and a temperature range of -40? to +85?. It also has 6A of resistance, 3mO of inductance, 2s of response time, and 20mO of resistance. The part is a 1210 size and is RoHS compliant.