Thermal Cutoff Fuse

Thermalcutoff fuse, also known as temperature fuse , is a temperature sensing circuit cut-off device. The thermal cutoff fuse can sense the overheat in the abnormal operation of electrical and electronic products, so as to cut off the circuit to avoid the occurrence of fire. Commonly used in: hair dryer, electric iron, electric cooker, electric stove, transformer, motor, water dispenser, coffee pot, etc. the temperature fuse can not be used again after operation, and can only be operated once at the fusing temperature.

There are three types of temperature fuses produced by Jaye:

1: Metal case temperature fuse

It is composed of sliding contact, spring and electrically non conductive thermal pellet. Before the temperature fuse starts, the current flows from the left lead to the sliding contact and through the metal shell to the right lead. When the external temperature reaches a predetermined temperature, the organic matter can melt and the compression spring will become loose. That is, the spring expands and the sliding contact is separated from the left lead. The circuit is opened and the current between the sliding contact and the left lead is cut off.

2-Ceramic type thermal cutoff fuse

It consists of an axisymmetric lead, a fusible alloy that can be melted at a specified temperature, a special compound to prevent its melting and oxidation, and a ceramic insulator. When the surrounding temperature rises, the specific resin mixture begins to liquefy. When it reaches the melting point, with the help of the resin mixture (increasing the surface tension of the melted alloy), the melted alloy rapidly shrinks into a ball with the two ends of the lead wire as the center under the effect of the surface tension, thus permanently cutting off the circuit.

3-Square shell thermal cutoff fuse

A section of fusible gold wire is connected between the two pins of the temperature fuse. The special resin is coated with fusible gold wire. The current can flow from one pin to the other. When the temperature around the temperature fuse rises to its operating temperature, the fusible alloy melts and shrinks into a ball attached to the ends of the two pins under the surface tension and the help of the special resin. In this way, the circuit is permanently cut off.