DZ47PLEY-63 series earth residual current circuit breaker (RCBO) has overload, short circuit, leakage protection and isolation functions. The product features with small size and compact structure. When there is electric shock or the leakage current of the power grid exceeds the specified value, the series of products can quickly cut off the fault current in a very short time to protect the safety of people and electrical equipment. This series is suitable for infrequent power-on/off of electrical devices and lighting lines, especially for industrial and commercial lighting distribution systems.