The TRB400 with PTC Resettable Fuses Through Hole P=5.1mm RoHS manufactured by TLC is a thermal fuse designed to protect electrical and electronic circuits from short circuits, overloads, and thermal runaway. It features a trip current of 12A and a tripping time of 40 milliseconds or less at rated current. The fuses are UL rated and RoHS compliant, making them suitable for a wide range of environments and applications. It is constructed from a Through-Hole design with an overall diameter of 5.1 mm and is designed to fit into most existing circuit boards. The TRB400 has built-in resettable protection that eliminates the need for a service call after a power trip, making it an economical and efficient choice for a wide range of applications.