The Russell 103079009 is a 2-wire fan delay switch designed to provide a controlled cooling-down period for motors after they are shut off. This prevents premature motor burnout by allowing the motor to gradually cool down before the power is completely removed. This delay switch is compatible with various Russell equipment, enhancing motor lifespan and improving overall system reliab... https://partsfe.com/103079009-russell-switchfan-delay-2-wire