Intermatic FM1STUZH-120U Timer

The Intermatic FM1STUZH-120U is a high-capacity 120V timer module engineered for seamless integration into HVACR control panels and OEM equipment. This 24-hour electromechanical unit features a robust 21A SPDT switch, providing the versatility to manage resistive loads or motor applications up to 1 HP. Contractors rely on this module for its heavy-duty construction and noise-immune synchronous drive, ensuring consistent performance in demanding commercial environments where electrical interference is common. The precise scheduling interface utilizes 96 captive trippers, allowing for 15-minute minimum switching intervals to optimize energy efficiency in refrigeration, ventilation, and lighting systems.

Designed for rapid field installation, the FM1STUZH-120U includes a manual 3-way override switch (ON/AUTO/OFF) for immediate testing and service bypassing without disrupting programmed cycles. Its compact 2.36" footprint and 1/4" quick-connect terminals simplify the wiring process within crowded enclosures. Whether you are replacing a failed 24-hour electromechanical timer or building a custom control solution, this Intermatic module provides a reliable 120V mechanical time switch interface with professional-grade longevity.

• High Switch Rating: Features a 21 Amp SPDT relay capable of handling 1 HP at 120 VAC, ideal for pumps and compressors.
• Granular Control: 15-minute switching increments provided by captive trippers that cannot be lost or misplaced.
• Manual Override: Integrated three-position toggle allows for manual ON, OFF, or AUTO operation for simplified maintenance.
• Noise Immunity: Synchronous motor drive resists electrical interference, ensuring the clock remains accurate in industrial settings.
• Standardized Fit: Compact panel-mount design integrates easily into existing control boxes and machinery.

Can I use this timer for 240V applications?
No, the FM1STUZH-120U is specifically rated for 120V AC input. For 240V needs, you would require the FM1STUZH-240U model.

What is the difference between the 'U' and 'H' in the part number?
The 'U' indicates a standard 120V module, while the 'H' signifies the inclusion of the manual override lever, allowing you to bypass the timer schedule manually.

How do I wire the SPDT terminals?
The Single Pole Double Throw configuration provides one common terminal, one normally open (NO) contact, and one normally closed (NC) contact, allowing for both load-switching and signaling applications.

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.