LB1Z-63 Series DC Magnetic Circuit Breaker acb 1. DC125/250/440V 2. ... 4. Experience since LB1Z-63 Series DC Miniature Circuit Breaker, apply to rating current 63A or less, ... is mainly used for the overloading and short circuit protection in DC distribution system equipment and electric ... Current In(A)Rated limit short circuit capabilityInstantaneous tripBreaking Current Icu(A)Time(ms)63A1DC125V1, 2, 3, 4, ...