The Model 335 and 365 Retriggerable One-Shot Timers are functionally interchangeable. The Model 335 is a DPDT potentiometer (knob-adjust) timer while the Model 365 is a DPDT, high-accuracy digital input timer. Solidstate timing circuits in each model drive an internal electromechanical relay. With power applied to the coil, when the initiate switch (dry contact) is closed, the relay will energize for the time period set by the user. At the end of the preset time period, the relay will de-energize. If the initiate switch opens and then closes multiple times while the relay is energized (i. e. it is retriggered), the relay will then restart the delay time. The relay will remain energized until the retriggering stops and the delay time ends. When power is removed, the relay will de-energize. An SG version of this model is available using silver with gold flash contacts.

Models 335 and 365 are UL Recognized and CSA Certified.