Intermatic
Intermatic T173 24 hr Electromechanical Contactor
24-hour electromechanical timer with 40 A DPST contacts, 12 on/off cycles, steel NEMA 1 enclosure and 11 extra trippers
- 24-hour scheduling with up to 12 daily on/off cycles
- 40 A DPST contacts handle 2 hp at 120 V and 5 hp at 240 V
- Steel NEMA 1 enclosure with gray enamel finish protects the mechanism
- Minimum one-hour setting and 23-hour maximum span cover most timing needs
- Two trippers included and extra trippers available for flexible programming
24-Hour Electromechanical Contactor
The Intermatic T173 is a 24-hour electromechanical timer designed for controlling electrical loads on a daily schedule. It suits installers and facility managers who need reliable, repeatable switching for motors, lighting or heating circuits in commercial or industrial settings.
Steel NEMA 1 Enclosure with DPST Contacts
A gray enamel steel enclosure rated NEMA 1 houses a double-pole single-throw contact set rated at 40 amps and 120 volts AC. The rugged metal housing protects the mechanism in indoor environments, while the DPST arrangement switches both lines of a circuit simultaneously for safer isolation.
12 On/Off Cycles Per Day with 1-Hour Minimum Setting
The timer accepts up to twelve on/off cycles every 24 hours, with a minimum on or off duration of one hour and a maximum setting of 23 hours. Two trippers are included and extra trippers are available separately, but the fixed 12-cycle limit means the unit cannot support shorter intervals or more frequent switching events.
Highlights
- 24-hour scheduling with up to 12 daily on/off cycles
- 40 A DPST contacts handle 2 hp at 120 V and 5 hp at 240 V
- Steel NEMA 1 enclosure with gray enamel finish protects the mechanism
- Minimum one-hour setting and 23-hour maximum span cover most timing needs
- Two trippers included and extra trippers available for flexible programming
Specifications
| Brand | INTERMATIC |
|---|
Questions about this item
Does the 120 V AC contactor support a 24-hour schedule with a 1-hour minimum on-time?
Yes, the electromechanical timer runs a 24-hour dial and the shortest on-period you can set is 1 hour, up to a maximum of 23 hours.
Will the steel enclosure with NEMA 1 rating fit in a standard 5-inch wide panel cut-out?
The metal case measures 5 in wide, 3 in deep and 7 13/16 in high, so verify your panel opening matches those dimensions before mounting.
How do I install the DPST contactor and which step is most often missed?
Wire the two poles to the 120 V supply and load, secure the gray enamel steel box, then insert the two included trippers on the dial — forgetting to set both on and off trippers is the common error.
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