Intermatic SW12HWK 12-Hour Spring Wound Timer – No Electricity Needed for Lighting & Appliances

Smart, energy-conscious timing for lights and appliances

The Intermatic SW12HWK is a compact, single-pole, single-throw timer designed to replace a standard wall switch. It operates without external power and limits how long a connected load stays on to a preset 12-hour window.

The white molded time dial plate fits both toggle and decorator switch plates, and the universal design makes it easy to swap into single- or multi-gang configurations without field modifications. The front dial and teeter-type terminals are designed for quick, tool-free installation, so you can upgrade your control setup with minimal downtime.

Key benefits for homes and small offices

• LED and CFL friendly: effectively controls modern lighting without compatibility issues, supporting energy-conscious spaces.
• Extended OFF time: automatically limits ON duration for loads such as fans, lights, motors, and heaters, supporting deliberate energy use.
• No electricity required to operate: the timer runs its mechanism independently, reducing standby consumption from the control itself.
• Easy installation: designed to fit standard single- or multi-gang wall switches with a universal plate-to-switch fit, making upgrades straightforward.
• Versatile control: automate a range of devices, including lighting, fans, heaters, and small motors, with a single timer.

In real-world settings, this timer helps you create predictable routines. In a living room, it can cap lighting for movie time; in an office, it can support after-hours shutdowns. The white finish blends with most decors, and the dial is straightforward to adjust as needs change.

Specs and safety

• CSA-certified construction with clear load ratings for resistive, tungsten, and motor loads.
• Designed to operate within common electrical standards (50/60 Hz) and to fit standard wall plates sold separately.

Note: Always review load ratings and installation instructions before use. The SW12HWK offers a practical, non-intrusive way to add timing control to everyday tasks, turning your existing switches into timed power apps without increasing your energy footprint.