310664 is identical to 310664/U

ensure the mounting bracket in your unit can accommodate the cylindrical shape

Lightweight and durable design specifically engineered for high-cycle residential and commercial heating applications

Enhanced Safety: Provides critical thermal overload protection

Intermatic FD12HC Timer Els PW 17895 310664 is identical to 310664/UThe Intermatic FD12HC is a heavy duty 12 hour spring wound timer engineered for precise control of HVAC systems, lighting, and industrial motors. As a SPDT spring wound timer, this unit offers versatile wiring configurations, allowing for both normally open (NO) and normally closed (NC) applications. Designed to replace standard wall switches, it features a robust mechanical countdown timer mechanism that does not require electricity to operate,