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Gray plastic electromechanical timer box with dial and contacts

Intermatic

Intermatic T103P Electromechanical Timer 24hr Gray Plastic Contactor

SKU CH-T5N3-KWVH3

Electromechanical timer controls 40 A loads on a 24-hour cycle with up to 12 on/off events daily

  • 24-hour scheduling with up to 12 daily on/off cycles
  • 40 A DPST contacts switch 2 hp at 120 V and 5 hp at 240 V
  • NEMA 3R plastic enclosure rated for outdoor use
  • Minimum one-hour setting and maximum 23-hour runtime cover most timing needs
  • Two trippers included plus compatible 2E054 extras for quick setup

Intermatic T103P 24-Hour Electromechanical Timer

The Intermatic T103P is a 24-hour electromechanical timer built for controlling single-phase loads on a 120 V AC supply. It uses a DPST contact form rated at 40 A with a 2 hp motor rating at 120 V and 5 hp at 240 V. The plastic NEMA 3R enclosure provides weather-resistant protection for indoor or outdoor mounting.

Suits Installers Needing Simple Daily Scheduling

This timer fits applications that require up to twelve on/off cycles per day with a one-hour minimum setting and a 23-hour maximum setting. It is not for users who need seven-day programming, sub-hour intervals, or battery-backed timekeeping during power loss. Buyers wanting digital precision or multi-schedule flexibility should look at a different class of controller.

40 A DPST Contact Rating at 120 V AC

The 40-ampere double-pole single-throw contact set is the specification that determines whether this timer can switch the intended load. Verify that the connected circuit does not exceed this current rating and that the 120 V AC coil voltage matches the supply before installation.

Highlights

  • 24-hour scheduling with up to 12 daily on/off cycles
  • 40 A DPST contacts switch 2 hp at 120 V and 5 hp at 240 V
  • NEMA 3R plastic enclosure rated for outdoor use
  • Minimum one-hour setting and maximum 23-hour runtime cover most timing needs
  • Two trippers included plus compatible 2E054 extras for quick setup

Specifications

BrandINTERMATIC

Questions about this item

How is the Intermatic T103P timer mounted and what wiring step is often missed?

Mount the plastic NEMA 3R enclosure vertically using the integral flanges, then connect both hot legs to the DPST contact terminals; the step installers skip is landing the neutral on the clock motor terminals so the 24-hour dial keeps time.

Which parts will need replacement after extended use?

The two included trippers (part 2E054) wear first; order extra 2E054 trippers for additional on/off settings, and plan to replace the internal clock motor if the dial stops advancing after years of 120 V AC operation.

What thermal or current limit appears first during continuous 40 A loading?

The 40 A contact rating at 120 V AC is the hard ceiling; sustained loads above 40 A or 2 hp motor starts will overheat the DPST contacts before the plastic enclosure reaches its NEMA 3R temperature limit.

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