Intermatic FF12HHC 12-Hour SPST Spring-Wound Timer with Hold

The Intermatic FF12HHC is a 12-hour spring-wound countdown timer engineered for dependable interval timing in HVAC, ventilation, and light commercial applications. Featuring a Single Pole Single Throw (SPST) switching configuration, this mechanical timer requires no external power source to operate — the spring-wound mechanism provides self-contained, reliable timing without batteries or wiring to a power supply.

The built-in Hold function allows users to lock the timer in the ON position indefinitely, providing continuous operation whenever needed without sacrificing the convenience of timed shutoff when the hold is released. This makes the FF12HHC ideal for exhaust fans, ventilation systems, lighting circuits, and other loads that benefit from both timed and continuous operation modes.

Key Features

• 12-hour spring-wound countdown timing mechanism
• SPST (Single Pole Single Throw) switching configuration
• Hold function for continuous ON operation
• Mechanical spring-wound design — no batteries or auxiliary power required
• Suitable for HVAC ventilation, exhaust fans, and light commercial timing applications
• Intermatic quality construction for long-lasting, reliable performance

Applications

• Exhaust and ventilation fan control
• Bathroom and kitchen fan timing
• Lighting interval control
• HVAC accessory timing circuits
• Light commercial and residential interval switching