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.
How it compares
Measured against everything we stock in Contactors, Relays & Motor Starters, at today’s prices. Recalculated every night.
- Price $52.99
- Cheaper than about 56% of the 1,098 comparable items (median $61.99).
Specifications
| Product | |
|---|---|
| Brand name | 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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