Intermatic SW12HWK 12-Hour Spring Wound Timer – No Electricity Needed | Energy-Saving Wall Switch

Overview

The Intermatic SW12HWK 12-Hour Spring Wound Timer is a mechanical, energy-saving solution designed to replace a standard wall switch. It operates without external electricity, automatically limiting the ON time of connected loads such as fans, lights, motors, and heaters. The white dial plate fits both toggle and decorator style wall plates, and can be used in single or multi-gang configurations with no field modifications required. This practical device brings a measured, reliable cadence to daily power use in homes and small offices.

Smart, No-Power Operation

Because this timer functions without drawing power to run the timer mechanism itself, it helps minimize energy usage while keeping control simple and intuitive. Users can set a predictable run window without worrying about additional electrical supply for the timer.

• LED and CFL compatibility ensures a broad range of modern lighting options can be managed.
• Extended 12-hour OFF control supports longer rest periods for loads like fans, lights, or small motors.
• Front-terminal teeter connections and a user-friendly knob enable quick, straightforward installation.

Versatile Use Cases

Designed for homes and offices, the SW12HWK offers flexible automation for common loads. It can help create energy-efficient lighting schedules, manage ventilation, or limit the operation time of equipment that should not run continuously.

• Residential applications: automate hallway or entryway lighting, or limit fan operation during off-hours.
• Commercial applications: control small equipment loads in break rooms or back-office spaces to promote efficiency.

Key Specifications and Fit

The timer supports a range of loads: Resistive (heater) up to 20 A at 125 VAC, 10 A at 250/277 VAC; Tungsten up to 7 A at 125 VAC; Motor up to 1 HP at 125 VAC and 2 HP at 250 VAC. It is CSA certified for quality and safety. The molded white dial plate is designed to align with standard single or multi-gang wall plates, and the unit ships ready for quick, secure installation with no special modifications required. Wall plate sold separately.