Intermatic
Intermatic FF312HH Spring Wound Timer 12 Hr SPDT Silver
Spring-wound timer automatically limits energy-consuming loads for up to 12 hours with SPDT switching rated at 1 hp at 120V and 2 hp at 240V
- 12-hour spring-wound operation requires no external power
- SPDT switching controls loads up to 1 hp at 120 V / 2 hp at 240 V
- Single-gang design fits standard electrical boxes
- cCSAus and RU listings confirm safety compliance
- Automatically limits runtime to reduce energy waste
Intermatic FF312HH Spring-Wound Timer
The Intermatic FF312HH is a spring-wound timer rated for 1 hp at 120 V and 2 hp at 240 V. It uses a single-gang SPDT switching mechanism to automatically limit the run time of energy-consuming loads. The unit carries cCSAus and RU standards compliance and is supplied in a silver finish.
Installers needing a mechanical time limit without
This timer suits applications where a simple, self-contained 12-hour wind cycle can control a single load up to the listed horsepower ratings. It is not for circuits that require multi-gang switching, electronic programming, or operation beyond the 12-hour maximum wind. Buyers who need longer cycles, multiple independent outputs, or digital precision should look at other devices.
Mounts in a standard single-gang enclosure
Installation follows ordinary single-gang box practice; the spring mechanism is wound manually to set the desired duration up to 12 hours. The most common issue is over-winding the spring or mis-wiring the SPDT contacts, which can prevent the timer from tripping or cause the load to remain energised. Verifying the horsepower rating against the connected motor prevents nuisance trips.
Highlights
- 12-hour spring-wound operation requires no external power
- SPDT switching controls loads up to 1 hp at 120 V / 2 hp at 240 V
- Single-gang design fits standard electrical boxes
- cCSAus and RU listings confirm safety compliance
- Automatically limits runtime to reduce energy waste
Specifications
| Brand | INTERMATIC |
|---|
Questions about this item
What voltage circuit must I already have to run this 1 hp at 120V / 2 hp at 240V timer?
The timer is rated for 1 hp on a 120 V circuit and 2 hp on a 240 V circuit, so your existing supply must match one of those voltages.
Will the SPDT contacts switch my existing contactor coil without extra relays?
The single-pole double-throw contacts can directly control a contactor coil or other load within the 1 hp / 2 hp ratings, no intermediate relay is required.
How do I confirm the spring-wound mechanism is timing the full 12 hours correctly after installation?
Set the dial to a short interval, watch the load switch off at the marked time, then verify the 12-hour maximum by running a full cycle and noting the automatic shut-off.
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