Cutler-Hammer MD20CR31 Timer Relay

The Cutler-Hammer MD20CR31 Timer Relay is a Series A3 control device that provides time-based switching for electrical circuits. This model is a 4-pole unit with a 10 Amp Coil and is designed to operate from a 110–120V AC supply at 50/60Hz. In industrial control panels, the MD20CR31 enables timed energization or de-energization of loads, supporting precise sequencing and delay functions across standard line frequencies. Being part of the MD20CR timer relay family, it emphasizes reliable switching performance and compatibility with control circuits that require a defined time interval between input activation and output response. The combination of a 4-pole configuration and the 110–120V, 50/60Hz input makes this timer relay suitable for a range of automation applications where timing behavior must be consistent. Key specifications include MD20CR31 model, Series A3, 10 Amp Coil, 110–120V AC, 50/60Hz, 4 poles.