The SMART-Pac is a small in-line power controller that enables the electric strike to operate with a variety of voltages, from 12 to 32 volts AC or DC, while utilizing only one solenoid.The SMART-Pacâ„¢ provides electronic regulated current for continuous duty operation without the normal heat build up. It includes an adjustable minimum activation timer which can be set from 2 to 8 seconds, or deactivated.The timer can be activated in both fail secure and fail safe operations.This device has been designed with on board safety features, including an in-line fuse to protect the strike and an M.O.V. to protect the host system from any possible reverse current surges.