... . AC: up to 63A, AC230/400V, AC50/60Hz; b. DC: up to 63A, DC110V/1P, DC125V/2P; Application: for protection ... point considered: the earthing systems(TNS,TNC),short-circuit current at the circuit-breaker installation point, which must always be less ... supply loads with high inrush current at the circuit closing(lv/lv transformers,breakdown lamps). Miniature circuit breaker NB1-63 1P 3A UL certificated