Abstract: A temperature safety resistor assembly includes a hollow shell, a resistor and two conductive components. The resistor is disposed within the shell and at least one of the two conductive components is welded with an end of the resistor by a low temperature solder. An elastic deformation portion is formed on the conductive component and the elastic deformation portion is deformed to accumulate an elastic restoring force. When the current flowing through the conductive component and the resistor is abnormally increased, the temperature of the conductive component is increased till a melting point of the low temperature solder, the solder is melted and the conductive component is bounded from the end of the resistor by the elastic restoring force of the elastic deformation portion so as to cut off the temperature safety resistor assembly and protect the rest of the circuits.

Abstract: An overcurrent protective wire wound resistor has a core, a second contact cap and a resistance wire. A first contact cap and a resistor connection seat are respectively mounted on two ends of a rod of the core. A low melting-point conductive layer is mounted around the rod and connected with the first contact cap and the resistor connection seat. A high-temperature contractive insulation layer is mounted around the low melting-point conductive layer and the first contact cap. The second contact cap is mounted around the contractive insulation layer. The resistance wire is connected to the resistor connection seat and the second contact cap. When current through the resistance wire abnormally increases, high temperature of the resistance wire melts the low melting point conductive layer to shrink the contractive insulation layer and open the low melting-point conductive layer and the resistor, thereby protecting the circuit connected to the resistor.

Abstract: A circuit protective device has a wire-wound resistor, a fuse and a voltage limiter connected by welding, and may be covered by a protective housing possibly filled with a filling material. The resistor withstands an incoming transient voltage and reduces a surge current through the voltage limiter to realize a more compact and inexpensive voltage limiter without compromising the surge protective capability. The voltage limiter clamps the incoming transient voltage to a specified level. When the wire-wound resistor or the voltage limiter is overheated by to a surge voltage which is higher than the surge voltage withstanding rating of this circuit protective device, either the wire-wound resistor melts down or the fuse opens to disconnect the electronic circuit from the AC mains against subsequent surges. Accordingly, the circuit protective device addresses a cost-saving, compact, robust and safe solution against surge voltages, surge currents and sustained voltages.

Abstract: A resistor having a body, a fuse component, a resistor component, a wire and a cover. The body has a top, a first positioning hole and a second positioning hole being formed in the top of the body. The fuse component is inserted in the first positioning hole. The resistor component is inserted in the second positioning hole. The wire connects the fuse component and the resistor component and is mounted outside the body. The cover is attached to the top of the body around the wire. Therefore, the body of resistor as described may be dried in an oven without damaging the resistor component. A method having steps of forming a body having two positioning holes, drying the body in an oven heated above 130° C., mounting a resistor component and a fuse component respectively in the positioning holes, and covering the positioning holes with an insulating cover.