Intermatic 15-Amp Heavy Duty Indoor Plug-In Dial Timer-TN311 - The Home Depot
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Model # TN311

Internet # 203954918

15-Amp Heavy Duty Indoor Plug-In Dial Timer

Intermatic 15-Amp Heavy Duty Indoor Plug-In Dial Timer

This item has been discontinued.
The Home Depot no longer carries this specific product.

$12.96 / each


Model # TN311

Internet # 203954918

The heavy duty indoor timer by Intermatic is ideal for automatically controlling air conditioners, personal computers, heaters, heavy-duty appliances and metal halide and HPS lighting fixtures. It plugs directly into a wall outlet with 3-prong grounded plug and receptacle. Color coded trippers make it easy to program.

  • Grounded receptacle and plug
  • Up to 3 on/ 3 off settings per day
  • Manual override
  • Captive trippers

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Amperage (amps) 
Color Family 
Electrical Features 
Electrical Product Type 
Timer Type 
Voltage (volts) 
Wattage (watts) 
Warranty / Certifications
Certifications and Listings 
CSA Certified 
Manufacturer Warranty 
1 year 


Rated 4.7 out of 5 by 26 reviewers.
Rated 5.0 out of 5.0 by Simple, effective .... This timer was bought for the sole purpose of controlling exterior Christmas lights automatically (interior use of timer with garage outlet and commercial extension cord). It is a simple "plug, program and forget" design which is compact and quite easy to use. Simply place one "pin" into a time slot for "on" and another for "off," adjust the center dial for actual time and let it run. Three sets of pins allow three separate start/end programs daily. Must be something you need daily - not able to pick and choose days of the week with this one. Also features a manual on/off switch for overide without removing pin settings. All in all for the price and ease of use, I would recommend highly. December 11, 2014
Rated 4.0 out of 5.0 by Pin indoor timer I realize that you can drop and/or lose the little pins but I still like this timer. The other ones can be easily hit or bumped up against and the settings get all messed up. You may not notice this until your light comes on at 2 a.m. I don't know why our local store nearby does not stock them. April 7, 2015
Rated 4.0 out of 5.0 by Timer Works Great, Easy to Use. So easy to use. I did have a problem getting the plugs in correctly and the time set so it would go on and off when I want. Just me getting it set right, that is the only reason I gave it 4 stars instead of 5. I have a plant light I want to turn on in the morning and off in the evening, want it running 12 hours each day, and at the same time each day. One little thing off my daily check list since the timer is taking care of that for me now. March 25, 2015
Rated 5.0 out of 5.0 by excellent product The timer is the only one that allows one to turn on and off manually. April 7, 2015
Rated 5.0 out of 5.0 by Best Timer!!! Bought a few of these timers years ago in the HD store by my home but they only carry them online now...My grandkids took the little green & red on/off picks out and lost them on 2 of my timers and I really wanted a few more anyway. These come with 2 sets of red & green on/off picks so I was able to use them on my timers that were missing the picks which worked out well.... These timers are so easy to set, very quiet and work like a charm...Thanks HD for keeping these in your vast array of home items. Just wished you still carried them in the stores... June 24, 2014
Rated 4.0 out of 5.0 by Seems reliable, but two weeks of use only. I followed the other fellow reviewers and gave up one cheaper version. I picked it up at a store near me. It feels heavy duty enough (they do not make real good stuff anymore!) It has been controlling a sixty watt incandescent light bulb (I have not found an LED equivalent for that yet). You can set it to turn on and off three times in a twenty four hours. The adjustments are very rough which means you have to play with it to get it close to the times that you want, and duration between two actions cannot be too short. Additionally, it seems that the clock either falls behind or works fast. I have to play with it to find out. All together it does what I want it to do and I am happy. I hope it will last long. February 3, 2015
Rated 4.0 out of 5.0 by Works as advertised Timer works well and is easy to set. Purchased for heaters in office and work as promised. December 10, 2014
Rated 5.0 out of 5.0 by Works as advertized I use this timer to turn on and off my TV & Disk player, I have saved some money on electric power, no need to keep TV on standby when not at home. February 26, 2015
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