JD-5A(NJBK3)Integrated Motor Protector (hereinafter referred to as protector) is applicable for overload, phasefailure and three-phase current unbalance protection of AC motor @ A.C.50Hz, less than AC400V rated operating voltage and 1A400A rated operating current for its continuous working or discontinuous working. Protector and AC contactor are generally used cooperatively. This product meets the requirements of IEC 60947-4-1.