There Are Three Working States Of Surge Protector In The Circuit

① Under voltages within the Uc value, the resistance is extremely large and the SPD can be considered non-existent;
② When the circuit voltage reaches the varistor voltage, the resistance drops sharply and the SPD is turned on;
③ The overvoltage generated in the circuit exceeds the Uc value, but has not yet reached the varistor start voltage. At this time, the leakage current of the SPD will increase. If the UC value is too low, the SPD will deteriorate and fail quickly.

In summary, choosing a suitable surge protector Uc value can not only reduce costs and extend the service life of the surge protector, but also effectively protect the back-end equipment from damage by surge voltage. If you want to know more about the selection of surge protectors, please consult Hangzhou Yizao, and our engineers will give you a detailed introduction.