Intermatic ST01 7-Day Heavy-Du...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$174.71
$111.15
Intermatic ST01 7-Day Heavy-Duty Programmable Timer, 120-277 VAC, 15A, White

Intermatic ST01 7-Day Heavy-Duty Programmable Timer 120-277V 15A with Astronomic Clock

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Model: ST01
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$174.71
$111.15
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Intermatic ST01 7-Day Heavy-Duty Programmable Timer 120-277V 15A with Astronomic Clock

Professional 7-Day Scheduling with Advanced Astronomic Features

The Intermatic ST01 7-Day Heavy-Duty Programmable Timer delivers professional-grade scheduling control with 120-277V compatibility and 15A capacity. This versatile white timer features advanced astronomic clock functionality that automatically determines dawn and dusk times, while supporting up to 40 ON/OFF events across a flexible 7-day programming schedule. The isolated switch design enables compatibility with any load type including AC and DC loads, making it ideal for diverse lighting and ventilation applications.

Professional Features & Benefits

  • 120-277V Wide Voltage Range: Compatible with both residential and commercial electrical systems for versatile installation options
  • 15A Heavy-Duty Rating: Handles substantial loads for reliable control of high-power lighting and ventilation equipment
  • 40 ON/OFF Events: Extensive programming capacity allows complex scheduling for sophisticated automation requirements
  • Astronomic Clock Feature: Automatically calculates dawn and dusk times for optimal lighting control without manual adjustment
  • No Neutral Wire Required: Simplifies retrofitting and reduces installation time in existing electrical boxes
  • Random Mode Operation: Varies ON/OFF schedule to provide lived-in appearance for security applications
  • Universal Load Compatibility: Isolated switch works with incandescent, fluorescent, CFL, LED, and both AC/DC loads

Technical Specifications

  • Applications: Air Movement & Ventilation;Indoor Lighting Control;Outdoor Lighting Control
  • Country Of Origin: Thailand
  • Depth: 1.813 in
  • Input Voltage Rating Range S : 120-277 VAC, 50/60 Hz
  • Marketing Description: Highly versatile Heavy-Duty Timers are ideal for any application that requires a simple or complex
  • Product Color: White
  • Product Height: 4.125 in
  • Product Length: NA NA
  • Product Weight: NA lbs
  • Product Width: 1.75 in
  • Warranty Period: 1-Year limited

Professional Applications

  • Indoor Lighting Control Systems
  • Outdoor Security and Landscape Lighting
  • Air Movement and Ventilation Control
  • Commercial Building Automation
  • Residential Smart Home Integration
  • Energy Management Systems
  • Security and Safety Lighting

Why Choose Intermatic Quality?

Intermatic delivers reliable timer control solutions with professional-grade construction and comprehensive 1-year limited warranty coverage. The ST01's white finish and compact 4.125" x 1.75" x 1.813" dimensions provide clean integration into any electrical installation, while the replaceable CR2 lithium battery ensures up to three years of dependable operation with automatic Daylight Saving Time adjustment.

Manufacturer Resources

Product Specs

Application:
Air Movement & Ventilation;Indoor Lighting Control;Outdoor Lighting Control
Country Of Origin:
Thailand
Input Voltage Rating Range S :
120-277 VAC, 50/60 Hz
Marketing Description:
Highly versatile Heavy-Duty Timers are ideal for any application that requires a simple or complex
Product Color:
White
Product Height:
4.125 in
Product Length:
NA NA
Product Weight:
NA lbs
Product Width:
1.75 in
Warranty Period:
1-Year limited
Product Depth:
1.813 in

Intermatic ST01 – Frequently Asked Questions

1) Will the Intermatic ST01 timer work on a 277V lighting circuit?
Yes. The ST01 heavy-duty timer is rated 120-277 VAC, 50/60 Hz, so it drops onto 120V residential circuits and 277V commercial lighting branch circuits alike. That single-part coverage is why it gets specified across a mixed building: one timer on the shelf covers the 120V exterior fixtures and the 277V high-bay or parking lot lighting. It switches 15A.
2) Does the Intermatic ST01 need a neutral wire in the box?
No neutral is required. That is the detail that decides most retrofits: older switch boxes, especially in commercial corridors and exterior wall switch locations, often have only a hot and a switch leg pulled, and a timer that demands a neutral means opening walls or pulling new wire. The ST01 goes in where the old toggle came out.
3) Will the Intermatic ST01 timer switch LED and fluorescent fixtures, or just incandescent?
The ST01 uses an isolated switch, which means the contacts are electrically separate from the timer's own supply. Practically, it will switch incandescent, fluorescent, CFL and LED loads, plus both AC and DC loads. That matters if you have retrofitted a building to LED and found the old mechanical or electronic timer chattering or failing to hold the load, or if you are switching a low-voltage DC circuit that a normal line-voltage timer cannot handle.
4) What does the astronomic clock on the Intermatic ST01 actually do for outdoor lighting?
It calculates local dawn and dusk automatically, so exterior lights come on at sunset and go off at sunrise without anyone touching the schedule as the seasons shift. For a property manager running parking lot or landscape lighting across a portfolio, that removes the twice-yearly trip to reset every timer, and it removes the burn hours you waste when a fixed clock schedule runs an hour past sunrise in June. Daylight Saving Time adjustment is automatic as well.
5) Will the Intermatic ST01 timer fit in a standard single-gang wall box?
The ST01 measures 4.125 inches height, 1.75 inches width and 1.813 inches depth. Check the depth number against what you have: 1.813 inches is the body depth behind the plate, so a shallow box or a box already crowded with conductors is the thing that stops this install, not the opening size. The color is white.
6) How many separate on/off schedules can the Intermatic ST01 hold?
Up to 40 ON/OFF events across a 7-day schedule. That capacity is the reason to reach for this one over a simple sunset-to-sunrise timer: you can run a different program for each day of the week, split a day into several on and off blocks (morning exhaust fan run, midday off, evening run), and still have events left over. A school or office with different weekday, Saturday and Sunday occupancy fits inside it comfortably.
7) Can I use a timer to make a vacant unit look occupied?
The ST01 has a random mode that varies the on and off times around the programmed schedule, so the lighting does not fall into the obvious fixed pattern that gives away an empty building. Landlords use it on vacant units between tenants and on seasonal properties. It runs alongside the regular 7-day program rather than replacing it.
8) Can the Intermatic ST01 control an exhaust fan, not just lighting?
Yes. Intermatic lists the ST01 for air movement and ventilation as well as indoor and outdoor lighting control. Scheduled fan runs are a common use: bathroom and locker room exhaust in multi-family, garage or crawl space ventilation, greenhouse circulation. The 15A rating covers most fractional-horsepower fan loads, but size the fan's actual nameplate amps against that 15A before you commit.
9) Does the Intermatic ST01 lose its program during a power outage, and does it need a battery?
It holds through outages on a replaceable CR2 lithium battery, rated for up to three years of operation. Because the cell is replaceable rather than soldered in, a dead battery is a two-minute service call rather than a replacement timer, which is what you want across a portfolio of openings and a maintenance crew that does not carry spare timers.
10) What is the exact part number for the Intermatic 7-day heavy-duty astronomic timer?
The manufacturer part number is ST01, an Intermatic 7-day heavy-duty programmable timer rated 120-277 VAC at 15A with astronomic clock, in white. It is built in Thailand. Quote the bare ST01 when ordering; there are no finish or voltage variants to specify on it, which keeps it simple to stock as a standard for a facility.
How fast can I get the Intermatic ST01 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Intermatic ST01 come with a warranty?
Absolutely. The Intermatic ST01 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Intermatic ST01?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Intermatic ST01 from ZenSupply?
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