Disclosed is an electronic magnetic contactor, the contactor including: an operation power supply unit inputting an operation power; an electronic switch driving unit receiving a power from the operation power supply unit to drive a power supply of a load; a switching unit switched by a pulse signal to drive the electronic switch driving unit; an operation state determination unit determining whether the electronic magnetic contactor is in an opened state or in a closed state; an input voltage sensing unit sensing an amplitude of an input voltage supplied from the operation power supply unit; and an input signal generation unit generating an input signal for determining whether the electronic magnetic contactor is inputted based on determined state by the operation state determination unit and the sensed amplitude by the input voltage sensing unit.