Self -recovery fuse is an overcurrent electron protection element. Under the condition of high -voltage, high temperature, and vulcanization reactions, it is made of special process processing under high -voltage, high temperature, and vulcanization reactions.Traditional fuse is protected only once, which can only be protected once, and it needs to be replaced. The self -recovery fuse has overflowing and automatic recovery.
The role of self -recovery fuse
Self -recovery fuse can certainly be reused.To put it simply, when the line appears abnormal current, its resistance will become very large, which generates a high temperature to prevent the passing of the current. When the temperature returns to normal, its resistance becomes smaller, thereby recovering and recoveringCircuit -turn.
Self -recovery fuse parameters
IH: Maximum operating current (25 ℃) IT: Minimum action current (25 ℃) itRip: overload current TMAX: Maximum action time VMAX: maximum overload voltage IMAX: maximum overload current: maximum overload current: maximum overload current
Self -recovery fuse principle
The principle of self -recovery fuse is that if the load is short or the current is too large, the insurance is inflated in a short period of time. It is composed of a film. The film is separated from zero to infinity after the bloating.120, 150, or 250, etc., refers to the disconnection temperature.This protection insurance has no fuse without reaction.
Self -recovery fuse selection
1. Determine the following parameters of the circuit: A maximum working environment temperature B Standard work current C Maximum working voltage (UMAX) D maximum fault current 2. Select self -recovery fuse components that can adapt to the maximum environmental temperature and standard working current of the circuit: use temperature discount foldingThe working current (a)} table of {ambient temperature (℃) and select the temperature that matches the maximum ambient temperature to the maximum circuit.Browse the column to check the equal or greater than the circuit standard working current value.3. Compare the maximum electrical rated value of the selected components with the maximum working voltage of the circuit and the fault current: use the electrical characteristics table to verify whether the components you choose in step 2 will use the maximum working voltage and fault current of the circuit.Check the maximum working voltage and maximum fault current of the device.Ensure that UMAX and IMAX are larger or equal to the maximum working voltage and maximum fault current of the circuit.

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