... year... NS MCCB molded case circuit breaker1.High quality with low price.2.Different type for selection3.Warranty:one year ... updated craft limited-current principle as well as making craft, with compact structure, full modulization, high disjunction, zero flying arc, and ... other features. Its insulation voltage is 750V, suitable for wires with AC 50Hz, rated working voltage of 690V and below, rated ...