The JK250-120U with PTC Resettable Fuses Through Hole RoHS is a surface-mounted thermal-reset fuse manufactured by Jinkaisheng. This part utilizes a PTC (positive temperature coefficient) resettable fuse that is in a single-sealed surface-mounted package. The PTC resettable fuses heat up in response to over-current conditions in order to trip, then reset once the over-current condition has been eliminated. The package also includes an integrated hex nut and a 7 tails of AWG28 for easy mounting and installation. This part is RoHS compliant and is designed for applications in consumer electronics, communication, automotive, industrial control, and HVAC/appliance industries.