Co LtdThe JK250-040U with PTC Resettable Fuses Through Hole RoHS product manufactured by Jinrui Electronic Materials Co Ltd is a fuse type circuit protection component. It is designed to protect electrical circuits against fault currents and thermal overloads. It operates with a snap-acting switch which opens the circuit when the current flow increases or temperature rises, and then reset the circuit after the fault is cleared. The component is RoHS-compliant and is packaged in an easy-to-use through hole form factor. The rated current is 0.4A, the rated voltage is 250VAC/250VDC, and the maximum power dissipation is 1.2W. It is suitable for use in a wide range of applications, including consumer electronics, telecommunications and automotive electronics.