The OR40-3 is a part of Memcor-Truohm’s Operational Relay product line. It is a heavy duty, fully programmable, solid-state relay used in a variety of industrial and commercial applications. Its main features include universal input voltage, a wide variety of configurable functions, and 4-channel output. This product is suitable for a variety of applications, including HVAC, motor speed control, process control, fan monitoring, and more.