Intermatic
Intermatic Spring Wound Timer 4 Hr SPST Silver FF4H
Spring-wound timer provides up to four hours of mechanical timing control with a 20 A rating at 125 VAC and 10 A at 250 VAC, SPST contacts, and silver faceplate
- Spring-wound mechanism needs no external power
- 0–4 hour timing range suits varied tasks
- SPST contact handles 20 A at 125 VAC
- CSA certified and UL listed for safety
- Silver faceplate with plastic knob for durability
Intermatic Spring-Wound Timer 4 Hour SPST
This mechanical spring-wound timer provides a 0 to 4 hour timing range with SPST contact form. It is suited for controlling single-circuit loads in industrial or commercial machinery where automatic shut-off after a set interval is required.
Replaces manual switching or fixed-time controls
The timer upgrades applications that currently rely on operator memory or non-adjustable delays. The jump is worth it when a process demands repeatable, adjustable timing up to four hours without external power for the timing mechanism.
Installs in a single-gang enclosure
The unit carries CSA certification LR3730 and UL listing E76987 for 125VAC at 20 A, 250VAC at 10 A and 277VAC at 10 A. Common issues include exceeding the 1 hp at 120V or 2 hp at 240V motor ratings and wiring loads beyond the stated ampere limits.
Highlights
- Spring-wound mechanism needs no external power
- 0–4 hour timing range suits varied tasks
- SPST contact handles 20 A at 125 VAC
- CSA certified and UL listed for safety
- Silver faceplate with plastic knob for durability
Specifications
| Brand | Intermatic |
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Questions about this item
What mounting style does the single-gang spring-wound timer use?
The unit is a single-gang device with a silver faceplate, designed for standard electrical-box mounting.
How is the spring-wound timer set and what common step is missed?
Rotate the plastic knob clockwise to the desired time up to 4 hours; the spring must be fully wound before the load will start.
Which electrical ratings should be checked before replacing the timer?
Verify the circuit does not exceed 20 A at 125 VAC, 10 A at 250 VAC, 10 A at 277 VAC, 1 hp at 120 V, or 2 hp at 240 V.
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