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Rectangular steel enclosure with front-mounted dial and timer mechanism

Intermatic

Intermatic T7801B 7-Day Electromechanical Timer Contactor

SKU CH-XSJV-KS4MJ

A 7-day electromechanical timer contactor with four poles, 40 A rating and steel NEMA 1 enclosure for HVAC scheduling

  • 7-day scheduling automates HVAC equipment
  • 40 A / 125 V AC rating handles heavy loads
  • 2 hp at 120 V and 5 hp at 240 V motor capacity
  • Steel NEMA 1 enclosure protects contacts
  • 5 to 21 hour timing range with day-skipper option

Electromechanical 7-Day Timer Contactor

The Intermatic T7801B is an electromechanical timer contactor designed for time-of-day scheduling of HVAC systems. It provides 7-day programming with a day-skipper feature and supports up to three on/off cycles per day. The unit mounts on a wall inside a steel enclosure rated NEMA 1.

40 A Contact Rating and Steel Enclosure

The contactor uses a 4-pole DPDT contact form rated at 40 A and 125 V AC. It handles 2 hp at 120 V and 5 hp at 240 V for motor loads. The steel enclosure protects the mechanism in standard indoor environments without active cooling or noise concerns.

Sustained Switching Up to 21 Hours

Minimum on/off settings start at 3.5 hours and extend to a maximum of 21 hours per cycle. Four trippers are included for immediate setup and extra trippers are available under part number 11Z966. The mechanism is built for repeated daily operation across the full weekly schedule.

Highlights

  • 7-day scheduling automates HVAC equipment
  • 40 A / 125 V AC rating handles heavy loads
  • 2 hp at 120 V and 5 hp at 240 V motor capacity
  • Steel NEMA 1 enclosure protects contacts
  • 5 to 21 hour timing range with day-skipper option

Specifications

BrandINTERMATIC

Questions about this item

How is the 7-day electromechanical timer contactor installed and what step do people often miss?

Mount the steel enclosure on a wall and wire the 4-pole DPDT contacts at 125 V AC; the step often missed is setting the minimum 3.5-hour and maximum 21-hour tripper pins before energising the 40 A circuit.

What maintenance or replacement will the timer contactor need later?

The included 4 trippers handle up to 3 on/off cycles per day; when scheduling changes, order extra trippers using part number 11Z966 to reconfigure the 7-day dial without replacing the whole unit.

What limit appears first during sustained operation of the 40 A contactor?

The NEMA 1 steel enclosure is rated for indoor use only; continuous 40 A loading at 125 V AC will hit the enclosure’s thermal boundary before the 2 hp at 120 V or 5 hp at 240 V contact ratings are exceeded.

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