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Internet # 205478792

Model # ST01K

Store SKU # 1002280764

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15 Amp 7-Day Indoor In-Wall Astronomic Digital Timer, White

$62.25
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  • Versatile 7-day programmable schedules with upto 40 ON/OFF events
  • Astronomic clock feature determines dawn and dusk times
  • Automatic Daylight Saving Time (DST) adjustment
  • View More Details
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Product Details

About This Product

The ST01 7-Day Programmable In-Wall Timer from Intermatic is a heavy-duty 15 Amp lighting control that can be installed in both residential and light commercial applications. Users can program up 40 ON/OFF events each week to automate routine lighting schedules and improve energy efficiency within the home. The ST01 simplifies everyday use with a convenient Astronomic feature, which allows homeowners to automatically set ON and OFF times throughout the year based on geographic dusk and dawn patterns. Similarly, the in-wall timer includes an automatic Daylight Saving Time (DST) adjustment feature, which keeps schedules in sync as the seasons change without requiring additional maintenance. Perfect for entryways, garages, landscape lights, attic fans and more, the ST01 In-Wall Timer offers an easy-to-use interface that makes programming schedules simple for homeowners of all technology backgrounds. The control can be installed in either a single or 3-way switch configuration, as well as paired with a variety of lights, including incandescent, fluorescent, CFL and LED. No neutral is required, making the ST01 an ideal retrofit solution.

Highlights

  • Random mode varies on/off schedule to provide a "lived-in" appearance
  • Single or 3-way switch compatible installation
  • Incandescent/fluorescent/CFL/LED compatible
  • Isolated switch allows timer to be used with any load type, including AC and DC loads
  • Replaceable CR2 lithium battery provides up to 3-years of operation
  • No neutral wire connection enables easy retrofitting and quicker installation
  • Perfect for entryway lighting, landscape light controls, attic fans and more
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Product Information

Internet # 205478792

Model # ST01K

Store SKU # 1002280764

Specifications

Dimensions: H 4.125 in, W 1.75 in, D 1.813 in

Dimensions

Product Depth (in.)

1.813 in

Product Height (in.)

4.125 in

Product Width (in.)

1.75 in

Details

Amperage (A)

15 A

Circuit Connection

Single Pole

Color Family

White

Color/Finish

White/Plastic

Compatible Bulb Type

CFL, Incandescent, LED

Control Function

Timer

Control Style

Push Button

Features

Combo Switch, Programmable

Finish Type

Gloss

Material

Polycarbonate

Maximum Time Setting (Min.)

1440

Package Quantity

1

Returnable

90-Day

Timer Type

Astronomic

Voltage (V)

120 V

Wall Plate Included

No Wall Plate

Warranty / Certifications

Manufacturer Warranty

1-year limited

Questions & Answers

does this work with LED bulbs or just incandescent bulbs?
BySep 13, 2025
1 Answer | 
Answer This Question

Hello - This is Bob from Intermatic Tech Support. Thank you for the inquiry. The ST01 will work with any type of light bulbs. If you have any questions please let us know.

By|Sep 15, 2025
    0/0


    Will this timer work with a 3- way dimmer switch
    ByAug 29, 2025
    1 Answer | 
    Answer This Question

    Hello Charleif - My name is Bob from Intermatic tech support. Thank you for the inquiry. This timer will not work with a dimmer in the 3-way operation.

    By|Aug 29, 2025
      0/0


      How is this programmed?
      ByJun 25, 2025
      1 Answer | 
      Answer This Question

      Hello Eubie - This is Bob from Intermatic tech support. Thank you for the inquiry. Please contact our tech support at 815-675-7000 for programming help

      By|Jun 26, 2025
        0/0


        does this timer work with incandescent and LED bulbs?
        ByApr 17, 2025
        1 Answer | 
        Answer This Question

        Hello, This is Bruce with Intermatic Technical Support. We appreciate your inquiry. Yes, it will work with Incandescent light bulb. If you have any other questions, you can call us at 815-675-7000 or email us at techsupport@intermatic.com.

        By|Apr 18, 2025
          0/0


          Does this timer require a separate neutral
          ByJan 18, 2025
          1 Answer | 
          Answer This Question

          Hello Scott - This is Bob for Intermatic tech support .Thank you for the inquiry. No that timer does not require a neutral connection.

          By|Feb 22, 2025
            0/0

            (1)

            Wiring schematic for Intermatic auto light timer
            ByJan 10, 2025
            1 Answer | 
            Answer This Question

            Hello Jimmmy - This is Bob from Intermatic tech support. Thank you for the inquiry. The wiring diagram is available at www.intermatic.com If you have any questions please contact us at 815-675-7000

            By|Jan 14, 2025
              0/0


              Is Battery required
              ByDec 14, 2024
              1 Answer | 
              Answer This Question

              Hello, this is Joel with Intermatic Tech Support. Thank you for your inquiry. Yes, the ST01K timer does require a CR2 battery and that battery is included with the timer. If you have any other questions, you can always call us Monday through Friday 8am-4:30pm CST at 815-675-7000 and speak with a live technician for support.

              By|Dec 16, 2024
                0/0


                how do i set the on/off timer?
                ByDec 10, 2024
                2 Answers | 
                Answer This Question

                Hello Linda - Thank you for the inquiry. Please contact our tech support at 815-675-7000 while in front of the timer.

                By|Dec 11, 2024
                  0/0

                  how to set Timer

                  By|Mar 18, 2025
                    0/0


                    Viewing 1-8 of 121

                    Customer Reviews

                    4.2 out of 5

                    • 4.2 out of 785 reviews
                    • 82% recommend this product
                    Filter by:
                    Showing 1-10 of 785 reviews
                    Reliable Product
                    Works like a charm. The battery lasts for quite a while too. The battery however ain’t that cheap but you get that for which you paid.
                    by
                    • Verified Purchase
                    • Recommended
                    The best brand for this task
                    by
                    • Verified Purchase
                    Easy Install and Works Great
                    I have purchased a number of Intermatic timers in the past for my own house and for my rental units. They are super easy to install and have worked perfectly over the years. There are several timing options for each day of the week so there is a lot of flexibility with regard to having your lights come on and turn off. If the power goes out, there is a handy battery backup so you won't lose your settings.
                    by
                    • Verified Purchase
                    • Recommended
                    Durable, useful, clean
                    I have 3 of these in various places in my house. These are solid devices that work great and look good. Beats a regular switch/wiring up a photocell by a mile.
                    by
                      • Recommended
                      1 found this review helpful
                      Installed 3 In a Day - Programmed in Minutes
                      I installed 3 of these on Saturday in two different 3-gang boxes. 2 of them are 3-way, one is single pole. As per the instructions, I programmed all 3 prior to installation. Programming the first took about 5 min and the other two took literally 60 seconds. Now, all three outdoor lights come on simultaneously at Dusk and turn off at Dawn (I programmed Dawn = 7:15AM). So I have it set to AUTO Dusk and Dawn, but I manually set what time I wanted "Dawn" to be. has been working flawlessly for 3 days. Two important things- set the clock first and make sure you set it right- by default it starts with AM. Pay attention to the flashing parts- you can always move backwards if you hit a button wrong. If you have an old shallow 1950's metal box like me, this will be a tight fit, but if you are neat and deliberate with your folds (use a screwdriver to neatly push wires in behind the box) it will fit in. BUT you will need to ditch the nuts they provided and buy the 14gauge orange nuts (and 16 gauge blue nuts for any single wires you cap off). Trust me, the smaller nuts make all the difference. Also, do yourself a favor and buy the Ideal Push-in connectors for any bundles in the gang box- it will make it far easier to neatly fold in the wires insteaded of twisted wires. There is about an inch behind the box, but if you have an incoming Romex wire coming into the box right behind, then it's more like 3/4" space. But it can be done. Frankly, connecting the wires only took me 2 or 3 minutes and programming was another 2 or 3 minutes- what took me 3 hours was all my planning ahead: labeling all my incoming cables, labeling all my pre-existing wires, and re-wiring the box so that everything would fit. If you understand the concept of pigtailing- this is not hard. Plus- I watched the Intermatic Youtube How-to video twice and it was soooo much easier if you watch the video. The diagram drawing is worthless- however, the table showing what each color should be connected to is crucial. Working without a neutral was not necessary- what was necessary for me was a unit that could handle single and 3-way so all the units were uniform. Also, I returned the Tork timers because there were 6 wires on each unit and there is no way they would have all fit into the box after capping off.
                      by
                        • Recommended
                        5 found this review helpful
                        Expensive maintenance
                        Installed and was happy for the first month or 2 until I had to replace the battery. CR2 batteries are not cheap and this light switch goes through them so fast. Ended up ordering a huge case of batteries, and right when they arrive the display stops working. To replace the batteries you need a small flathead to open, broke a finger nail on it once when I was to lazy to grab my tool box. Just went back to a regular switch and I am so happy to be rid of this.
                        by
                          5 found this review helpful
                          Very easy to install, whenever you cant adapt a photocell into an outside fixture, it's perfect f...
                          Very easy to install, whenever you cant adapt a photocell into an outside fixture, it's perfect for that.
                          by
                          • Verified Purchase
                          • Recommended
                          Good switch
                          I had no issue installing and programming the timer, it worked as advertised. my on complaint is that I wish it was back lit.
                          by
                            • Recommended
                            2 found this review helpful
                            This is the second one of these I've purchased over the years. The first one worked great. This...
                            This is the second one of these I've purchased over the years. The first one worked great. This one not so much. I had a professional electrician install it for my front porch lights.Unfortunately we've been unable to get it to work properly. We wanted to use the dusk to dawn feature. The lights do turn on at dusk however they do not turn off at dawn. We've reset and programmed multiple times but it just does not work.
                            by
                            • Verified Purchase
                            13 found this review helpful
                            I just replaced an Intermatic timer blown by a lightening strike. It's a good timer. However, t...
                            I just replaced an Intermatic timer blown by a lightening strike. It's a good timer. However, the display is difficult to read in low light, and sometimes confusing. You need to pay attention to the flashing parts of the display. It takes several tries to get the basic scheduling right. Overall a good replacement for the other Intermatic timer.
                            by
                            • Verified Purchase
                            • Recommended
                            2 found this review helpful
                            Showing 1-10 of 785 reviews

                            Compare Key Features

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                            Product Snapshot

                            Ideal for automating lights: programmable 7-day timer with astronomic and DST features for energy efficiency.
                            Ideal for indoor lighting control, this digital timer offers programmable 24-hour or 7-day scheduling and a random setting for added security.
                            Ideal for indoor/outdoor lighting control, this 7-day programmable timer automates schedules and enhances security with random mode.

                            Dusk-to-Dawn Sensor

                            Weatherproof

                            Programmable

                            Random On/Off Feature

                            Multiple Outlets