DDC, DBR, PG series breaker is suitable for AC 50Hz Or 60Hz,250V/440V circuit with overload, short circuit and earth leakage protection.On the occasion of shock hazard or earth leakage, the switch cuts off the fault circuit immediately. What is more, the rated current of overload protection is adjustable. The customer can adjust suitable current according to need. Thus its function is very well in overload and leakage protection.