type jvm2-63mcb standard iec60898 number of poles 1p、1p+n、2p、3p、3p+n、4p rated current(in) 1、2、3、4、6、10、16、20、25、32、40、50、63a rated voltage(un) ac 230(240)/400(415)v rated frequency 50(60)hz curve b、c、d short-circuit breaking capacity(icn) 6000a magnetic releases operate b curve: between 3 and 5 in 　c curve: between 5 and 10 in 　d curve: between 10 and 14 in endurance ≥ 4000 terminal protection ip20