Does DC Surge Protective Device have to install a circuit breaker?

Does DC Surge Protective Device have to install a circuit breaker?

Yes, a circuit breaker must be installed in front of the DC Surge Protective Device to protect the circuit. The function of the circuit breaker is to quickly cut off the power supply when the circuit fails, to prevent current overload, and to protect the safety of equipment and personnel. DC Surge Protective Device is used to protect the circuit from electromagnetic surge or overvoltage, but if there is no circuit breaker, when the circuit fails, the DC Surge Protective Device may not work normally, resulting in equipment damage or personal injury. Therefore, a circuit breaker must be installed before installing the DC Surge Protective Device.