Intermatic FM/1STUZ-120U Timer

The Intermatic FM/1STUZ-120U Timer is a high-capacity 24-hour electromechanical timer module engineered for seamless integration into machine control panels, HVACR systems, and industrial equipment. This 120V SPDT timer features a robust 21 Amp resistive rating, making it a reliable choice for managing heavy-duty loads such as 1 HP motors, commercial refrigeration cycles, and lighting arrays. Designed with a synchronous drive, the module ensures timing accuracy synchronized with line frequency, effectively eliminating the drift common in lower-quality alternatives. Its compact 2.36-inch square footprint and 1/4-inch quick-connect terminals streamline the installation process in tight enclosures. The unit utilizes captive trippers for easy programming in 15-minute intervals, providing high-resolution control for complex operational schedules. As a panel-mount timer, it offers a noise-immune design that maintains peak performance even in electrically noisy industrial environments containing contactors and VFDs.

• High-Amperage Switching: The 21A SPDT switch provides versatile control for both normally open and normally closed circuits, supporting resistive, inductive, and tungsten loads.
• Precision Scheduling: Includes captive trippers that cannot be lost, allowing for minimum 15-minute ON/OFF cycles across a full 24-hour timing range.
• Industrial Durability: Rated for a wide temperature range of -40 to 185 degrees Fahrenheit, ensuring stability in extreme mechanical rooms or outdoor control boxes.
• Universal Integration: Specifically designed as an OEM-style timer module for refrigeration defrost cycles, pump circulation, and security system automation.

How do I set the current time on this module?
Rotate the minute hand clockwise until the accurate time of day on the outer dial aligns with the triangle marker on the inner dial. Never rotate the outer dial directly, as this can damage the internal gearing.

Can this timer be used for 240V applications?
No, the FM/1STUZ-120U is specifically rated for a 120 VAC input. For 240V systems, you must use the 240V equivalent (FM1STUZ-240U) to avoid damaging the synchronous motor.

Does this unit have a manual override switch?
This specific model does not feature a manual override. If your application requires a manual ON/OFF/AUTO toggle, look for models with the 'H' suffix (e.g., FM1STUZH-120U).

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.