MQL7-63 series DC miniature circuit breaker is suitable in normal current 63A 10kA and below,directly-current rated voltage 250V-1000V DC, used for carrying on the overload, short-circuit protection to the current electrical power distribution system's facility and the electrical equipment and used in professional electric power, posts, and telecommunications transportation, industrial and mining establishments, etc., it complies with IEC60898-2 standards.