The Current Fuse tube of some matters needing attention in use

1, was selected the rated voltage of the Current Fuse, should be greater than protected circuit of the input voltage.

2, UL specifications rated current of the fuse is set under laboratory conditions, actual use should be less than 75 [%] use of nominal value. For example, the working current of 0.75 A, the smallest choose rated current 1 A fuse tube.

3, the Current IEC specifications rated Current of Fuse tube, the actual when using, can according to the nominal value of 90 or 100 [%] [%]. Circuit working current of 0.9 A, for example, the minimum can choose rated current is 0.9 A or 1 A fuse tube.

4, different using the environment temperature, the working life of the fuse is not the same, the higher the temperature, the fuse of shorter working life; Should be made according to the actual selection coefficient increase rated current of the fuse is chosen. Our products catalog has indicate the temperature curve, reference for choosing the fuse tube.

5, breaking capacity of the fuse pipe and its volume is proportional to the, is inversely proportional to the voltage rating. That is, the greater the volume or the smaller the rated voltage, the greater the breaking capacity of the fuse tube; The smaller the volume or the rated voltage, the greater the fuse tube breaking capacity. So, if choose fuse tube of small size, to determine the protection circuit may appear the short circuit current is not too big; Such as the protection circuit may appear bigger short-circuit current, must choose a larger breaking current larger fuse tube. Product catalog the winning various models, specifications of the breaking current, a total of reference when choosing the fuse tube.

6, surge I2T protection circuit should be less than the fuse tube I2T rating 20 [%], the fuse tube can withstand more than 100000 times in the protected circuit of surge.