An apparatus, circuit and method for operating a solenoid-actuated electromechanical door latching mechanism that includes a capacitor to meet the power surge requirements needed to move a door latching mechanism. A power supply at one end of a transmission line is coupled with a capacitor adjacent the solenoid at the other end of the transmission line to reduce the need for a larger capacity power, heavy gauge transmission lines and increases the distance at which a power supply may be located from a door latching device.