... 8, Type A: No overload release on N pole, which is making at the time; Not closing ... 9, Type B: No overload release on N pole, which closing and opening with the other three poles. ... 10, Type C: With overload release on N pole, which closing and opening with the other three poles. ... and opening withthe other three poles. Main specification: Pole No.: 3 pole, 4 pole Rated Working current (A): 12.5, 16, ...