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Grey steel enclosure electromechanical timer switch with dial

Intermatic

Intermatic 125VAC 40A 24-Hour Electromechanical Timer Switch

SKU CH-3R8R-Y7H59

Electromechanical timer switch controls 40 A at 125 V AC with 24-hour cycle, 12 on/off settings and NEMA 3R steel enclosure

  • Product typeTime Controlled Switches
  • Electromechanical operation runs without batteries or programming
  • 125 VAC 40 A rating handles heavy motor and heating loads
  • DPST two-pole switching breaks both lines for safety
  • NEMA 3R steel enclosure withstands outdoor weather exposure
  • 23-hour maximum setting with 12 daily on/off cycles

40 A 125 VAC Electromechanical Timer

This Intermatic timer provides 24-hour scheduling for loads up to 40 amps at 125 volts AC. The DPST contact form switches two poles simultaneously, making it suitable for controlling pumps, heaters or lighting circuits in residential and light-commercial settings.

Surface-Mount Steel Enclosure Installation

The NEMA 3R steel box with gray enamel finish is designed for surface mounting and includes two captive trippers for basic on/off programming. A minimum setting of 1 hour and maximum of 23 hours limits fine-grained schedules, and the 12-cycle daily cap prevents rapid cycling applications.

Verify Voltage, Amperage and Tripper Needs

Confirm the supply is 125 VAC and the connected load does not exceed 40 amps or 2 hp at 120 V / 5 hp at 240 V. The timer operates from -40 to 156 degrees Fahrenheit, and extra trippers use part number 2E054 if more than two on/off events per day are required.

How it compares

Measured against everything we stock in Electrical Switches & Dimmers, at today’s prices. Recalculated every night.

Price $97.99
Pricier than about 75% of the 791 comparable items (median $39.99).

Specifications

Product
Brand nameIntermatic
Product typeTime Controlled Switches

Questions about this item

How can I verify the timer is running correctly after wiring it to a 125 VAC circuit?

After installation, set the dial to the desired on/off times using the included trippers and observe the connected load switching at those points; the unit supports up to 12 on/off cycles per 24-hour period.

What ships with the timer and what must be purchased separately?

The steel NEMA 3R enclosure with gray enamel finish comes with two trippers installed; additional trippers are available separately as part number 2E054.

Which timing range should I select for a schedule that runs longer than 12 hours but less than a full day?

The electromechanical dial offers a minimum setting of 1 hour and a maximum of 23 hours, so any schedule within that window can be programmed directly.

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