Pool pumps, water heaters, circulation motors and outdoor lighting on 208 V or 240 V circuits still run most reliably on a mechanical time switch. The Intermatic T104R3 is a 24-hour, 208-277 VAC mechanical time switch with a double-pole single-throw (DPST) 40 A contact, housed in a beige Type 3R metal enclosure for indoor or outdoor mounting. It allows up to 12 ON and 12 OFF operations a day.
Why electricians pick it
- DPST contacts open both hot legs of a 240 V load.
- High motor ratings: 5 HP (28 FLA) at 240 VAC and 2 HP (24 FLA) at 120 VAC.
- 40 A resistive heater rating from 120 to 480 VAC and 16 A LED/electronic ballast rating at 120/277 VAC.
- Type 3R steel enclosure rated for outdoor use from -40 to 54°C.
- Teeter-type terminals accept multiple load connections; one ON and one OFF tripper included.
Specifications
| Spec |
Detail |
| Brand |
Intermatic |
| Model |
T104R3 |
| Type |
24-hour mechanical time switch in enclosure |
| Clock motor voltage |
208-277 VAC, 60 Hz |
| Contacts |
DPST, 40 A |
| Motor load |
2 HP / 24 FLA at 120 VAC; 5 HP / 28 FLA at 240 VAC |
| Other ratings |
40 A resistive heater 120-480 VAC; 40 A tungsten 120-277 VAC; 16 A LED/electronic ballast; 1000 VA pilot duty |
| Operations |
12 ON / 12 OFF per day |
| Enclosure |
Type 3R metal, beige |
| Dimensions |
10-1/8 x 6-1/2 x 3-5/8 in |
| Knockouts |
Bottom: (2) 1/2 and 3/4 in; back: 1/2 and 3/4 in combination |
| Certifications / warranty |
cULus, cCSAus; 1-year limited |
Pro tip from the counter
Bring conduit in through the bottom or back knockouts Intermatic provides, not through the top or upper sides of the case. A Type 3R enclosure sheds rain from above, and a punched top entry is the usual way water ends up running down onto the clock mechanism.
Best for: pool and spa pumps, 240 V water heaters, circulation and irrigation pumps, outdoor lighting on 208 or 277 V circuits, replacement of existing T104 timers
Downloads: Technical data (PDF)
We ship across Canada from Vaughan, ON. Contractors can get trade pricing through a quote or at (905) 553-7171.