Three types of temperature fuse

Dec 30,2019

First: organic type temperature fuse：

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

The second type: porcelain tube type temperature fuse：

It consists of an axisymmetric lead, a fusible alloy that can be melted at a specified temperature, and a special mixture and insulating porcelain tube to prevent melting and oxidation. When the ambient temperature rises, the specific resin mixture begins to liquefy. When the melting point is reached, with the help of the resin mixture, the melted alloy rapidly shrinks into a ball with the two end leads as the center under the action of the surface tension, thus permanently cutting off the circuit.

Third type: square shell type temperature fuse：

A section of fusible gold wire is connected between the two pins of the temperature fuse. The special resin covers the 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 end of the two pins under the action of surface tension and special resin. In this way, the circuit is permanently cut off.

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How to choose a fuse?

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How to choose a fuse?

None