The selection standard of fuse holder can refer to 5 standards. The following is to understand together with the fuse block factory:

1. Safety certification:

According to the safety certification resolution fuse required by the whole machine, such as UL standard.

2. Structure scale:

Determine the size of the scale according to the space in the circuit design, such as length, diameter, whether there is lead wire, etc.

3, extra voltage:

It is necessary to be greater than or equal to the practical service voltage, generally 24V, 32V, 63V, 125V, 250V and so on.

4. Breaking ability:

Should be greater than the zUI fault current in the circuit.

5. Additional current:

Subject to the following items:

(1) Normal operating current, operating at 25℃.Additional current for UL standard fuses ≥ normal operating current /0.75.

(2) Ambient temperature: The current carrying capacity test of the fuse is conducted under the ambient temperature of 25℃. The higher the ambient temperature is, the shorter the life of the fuse is and the lower the bearing capacity is.

(3) Pulse: the pulse will have thermal cycling and mechanical fatigue that will affect the life of the fuse. In the design, the pulse I2T should be less than the nominal melting heat energy I2T of the fuse under the premise of considering the pulse factor.Fuse additional I2T& GT;Practice pulse I2T/Pf.

Above is the detailed introduction of fuse holder selection criteria, I hope you will like it!We specialize in:inline fuse holder,panel fuse holder,circuit board fuse holder,automobile fuse holder;Welcome your consultation ~