NEW 18MM 230V AC MCB TYPE A RCBO RCCB 1P+N 4.5KA Residual Current Circuit Breaker 30MA Overload Over Current Leakage Protection 1P+N The main difference between Type A leakage protector and AC type leakage protector is: AC type only protects against AC leakage, it cannot act on DC pulsation leakage, and cannot protect it. Type A circuit breaker protects against AC leakage. Protects against DC pulsation and leakage. Human body electric shocks, electrical equipment damage, electrical fires, etc. caused by DC pulsation leakage occur from time to time. Therefore, Type A is more comprehensive and safer than type AC for leakage protection. Common electrical equipment that can easily cause pulsating DC residual current components in life include notebook computers, tablet computers, mobile phones, microwave ovens, induction cookers, refrigerators, washing machines, air conditioners, charging piles, etc. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.