---
product_id: 1048998
title: "TN311 Heavy-Duty 24-Hour Indoor Mechanical Plug-in Timer - Efficient Control, Customizable Scheduling - Timer for Lighting, Fans & Small Appliances"
brand: "intermatic"
price: "S$42"
currency: SGD
in_stock: true
reviews_count: 11
category: "Intermatic"
url: https://www.desertcart.sg/products/1048998-tn311-heavy-duty-24-hour-indoor-mechanical-plug-in-timer
store_origin: SG
region: Singapore
---

# 3 ON/OFF cycles/day 15A / 1875W heavy-duty load Mechanical manual override TN311 Heavy-Duty 24-Hour Indoor Mechanical Plug-in Timer - Efficient Control, Customizable Scheduling - Timer for Lighting, Fans & Small Appliances

**Brand:** intermatic
**Price:** S$42
**Availability:** ✅ In Stock

## Summary

> ⏳ Take control of your day—schedule smarter, live easier!

## Quick Answers

- **What is this?** TN311 Heavy-Duty 24-Hour Indoor Mechanical Plug-in Timer - Efficient Control, Customizable Scheduling - Timer for Lighting, Fans & Small Appliances by intermatic
- **How much does it cost?** S$42 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/1048998-tn311-heavy-duty-24-hour-indoor-mechanical-plug-in-timer)

## Best For

- intermatic enthusiasts

## Why This Product

- Trusted intermatic brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Reliable & Resilient:** Automatically resumes timing after power outages—never miss a beat in your routine.
- • **Fail-Safe Manual Override:** Instantly toggle power ON/OFF anytime without disrupting your preset schedule.
- • **Heavy-Duty Power Handling:** Supports appliances up to 15 Amps and 1875 Watts—perfect for fans, heaters, and more.
- • **Precision 24-Hour Control:** Customize up to 3 separate ON/OFF cycles daily for ultimate scheduling flexibility.
- • **Energy-Saving Mechanical Design:** Operates without electricity, reducing standby power consumption and lowering your bills.

## Overview

The Intermatic TN311 is a robust indoor mechanical plug-in timer designed for heavy-duty appliances. It offers customizable 24-hour scheduling with up to 3 ON/OFF cycles, supports loads up to 15 Amps and 1875 Watts, and features a manual override for instant control. Its energy-efficient mechanical operation requires no power to run, ensuring reliable, cost-effective automation for lighting, fans, heaters, and small appliances. UL and CSA certified, it automatically resets after power interruptions, making it a trusted solution for busy professionals seeking effortless home automation.

## Description

Product Description Plug In Timer, Mechanical, Min. Time Setting 30 min, Max. Time Setting 30 min, 23 hr, Max. On/Off Cycles 3, Voltage 120V AC, Watts 1,750 W, Amps 15 A, HP @ 120V 1 hp, Type of Switch Mechanical, Indoor, Receptacles 1, Receptacle Type 5-15R, Color White, Length 3 13/64 in, Width 3 13/64 in, Depth 3 13/64 in, Style Plug In, Features Manual Override, Standards CSA, UL From the Manufacturer This energy saving heavy-duty grounded timer plugs directly into the wall and controls 120-Volt air conditioners, heaters and any other heavy-electrical load up to 3 ON/3 OFF settings per day. Rated for loads up to 15 Amps resistive and 1875 Watts tungsten.

Review: Separetely designated "on" trippers and "off" trippers are a very important feature for me. - These are, as far as I know, the only timers that have designated "on" trippers and designated "off" trippers. I plug my crock pot or other device into this when I want it to turn itself off if I forget to do so. So, I just install only one of the "off" trippers. I place no other tripper on the wheel. I use the manual switch on the timer to power up the crock pot and set the "off" tripper at some time when I want it to turn off. Then, if I am going to be really late coming home, I know it will shut off before a dry crock pot starts blazing. And, because I only installed an "off" tripper, it will never start up the crock pot again on its own. Other timers that have trippers have trippers that are all the same. If I used one of those, then the timer would turn off but it would also start up the crock pot the next day when that tripper was encountered in the next 24 hour cycle. I like to slow cook meats over 12 or more hours and I put it out in the garage so it doesn't stink up the house. (Lots of spices, chilis, and onions slow cooking over many hours can impregnate your drapes, carpets, and woodwork with aromas that won't go away for days and days...so I put it in the garage.) I could certainly envision a day when I set the food to cook, but I would get called away on a late night job, It would be just like me to come home tired, go to bed, and forget entirely about the food cooking in the garage. In good weather, I'll park my car outside. It could be days and days before I remember the food in the crock pot out in the garage. With this Intermatic timer, no problem. Fire department didn't have to come. It shut off the crock pot and won't start it up again, and again, and again like other timers would do. These timers will work with inductive, resistive, magnetic fluorescent, and electronic fluorescent, including twistie bulbs. It's got a 15 amp 3 prong outlet. Motor turns the wheel. Simple. Reliable. I like it. The operative logic of such a simple device is bullet proof. What if the power goes out? It starts up again when power is restored. But, oh, you say, your food will be rotten if it's off more than a half hour? No problem, Just look at the wheel when you retrieve your food. You set the wheel for the correct time when you started cooking. If the time is off more than whatever period you think is unsafe to eat? You will know.
Review: Simple, cheap solution to simple appliances without programmable timers - I got this because I have a wall mounted swamp cooler that cannot be programmed to turn on or off. (I first heard about this device from reviewers that owned food dehydrating machines that did not come with an automatic off option, and they would remedy it by plugging in dehydrator into a timer and set it to turn off after set hours). This is simple, yet useful. The timer on the dial is not accurate to the "T" but it's close enough and good enough. I got tired of coming out to the living room in the middle of the night, shivering, because the swamp cooler would get our house too cold by 2am, but it's just too hot here in the evening (bedtime) to shut it off, and this was the solution for me. I only need one set of red and green for now; have it go off at 1am-ish and come back on at 9:30-ish in the morning.. (Not to mention there's the on and off switch on top in case I just want to shut it down) but during the winter when I am not using the swamp cooler I may use this for some other appliance.. not sure what yet. As of writing this review I had this unit for 3 months and it's been working without failure. Also, I like that it directs the plug to the side to the right (as you can see in the pic) so that it would make whatever plug fit behind furniture or tight spaces. If there's only thing that makes me question it, is when it goes from off to on, I see a contained, but visible static spark sort of inside the dial up on top. I'm not sure if that's just normal or a hazard since I'm not an electrician. I will post that question on the review page and see what others say.

## Features

- Manufacturer: Intermatic
- Country of Manufacturer: Mexico
- Easy to Use: This indoor home-use timer switch plugs directly into the wall and features an easy-to-use manual override (on/off toggle) for added convenience
- Energy Efficient: This heavy-duty, grounded plug-in timer uses no electricity to operate and is an energy-saving solution for controlling indoor lighting, fans, heaters, and more

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B005MMSTNG |
| Batteries required | No |
| Brand | Intermatic |
| Color | Color |
| Customer Reviews | 4.5 4.5 out of 5 stars (3,499) |
| Global Trade Identification Number | 00078275127890, 07827512789017 |
| Import | Imported |
| Included Components | Unit^Instruction Guide |
| Is Discontinued By Manufacturer | No |
| Item Weight | 6.4 ounces |
| Item model number | TN311 |
| Manufacturer | Intermatic Incorporated |
| Material | Plastic |
| Number of settings | 3 |
| Product Dimensions | 30"D x 8"W x 6"H |
| Specifications | UL |
| Thickness | 1 Inches |
| UPC | 732454492048 078275127890 600682784191 719918344228 078275047518 790683736913 782298966700 735090735173 716080043782 077348324686 642008231576 759309507924 738759804944 711717434216 |
| Warranty Description | See manf description. |

## Product Details

- **Brand:** Intermatic
- **Color:** Color
- **Item Weight:** 6.4 ounces
- **Material:** Plastic
- **Product Dimensions:** 30"D x 8"W x 6"H

## Images

![TN311 Heavy-Duty 24-Hour Indoor Mechanical Plug-in Timer - Efficient Control, Customizable Scheduling - Timer for Lighting, Fans & Small Appliances - Image 1](https://m.media-amazon.com/images/I/71KPLcfYy7L.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: I don't know how to set the timer.**
A: Though the other person's answer works, flipping the order is the better way. Put the pins in first and then spin the dial one whole rotation before setting the current time. This way, the pins will activate or deactivate the timer depending on the current time.For example. Say you want to set the timer to turn on at 8AM and turn off at 8PM, and you do the initial setup at noon. If you set the time first and then insert the pins, the timer may not be turned on right away, as it should be, because noon is between 8AM and 8PM. If you insert the pins first, and spin the dial, the Green pin at 8AM will flick the timer on, and when you plug it in, it will be activated as it should be. If you decided to do the initial setup at 9PM, if you put the pins in first and spin the dial, the timer would automatically be deactivated by the red pin, because 9PM is not between 8AM and 8PM.If you follow the other answer, you may need to manually flick on ON/OFF dial on the top.

**Q: When the timer trips from On to Off, do you get a spark?**
A: Yes, it sparks (tiny), but it's internal at the switch. It should NOT be used in any flammable atmosphere.

**Q: Is the device small enough to leave one free outlet or will it take up both spaces?**
A: The timer will leave an outlet open if you plug it on the bottom socket. The top of the timer will reach the centerline of the outlet, so if you don't have another huge plug it will leave the top one free

**Q: Should the switch be turn to on or off for it to be used as a timer?  Either mine isn't working or I don't know what I am doing...**
A: When you first set the triggers, rotate the dial at least 360 degrees . The switch is only for manual operation. If you rotate the switch to manually turn light on or off. The switch might stick in a way where the trigger will not turn the light on or off. The timer turns the light on or off by rotating the same switch you rotate for manual operation. Rotating the dial 360 degrees should reset everything.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Separetely designated "on" trippers and "off" trippers are a very important feature for me.
*by R***Y on March 28, 2015*

These are, as far as I know, the only timers that have designated "on" trippers and designated "off" trippers. I plug my crock pot or other device into this when I want it to turn itself off if I forget to do so. So, I just install only one of the "off" trippers. I place no other tripper on the wheel. I use the manual switch on the timer to power up the crock pot and set the "off" tripper at some time when I want it to turn off. Then, if I am going to be really late coming home, I know it will shut off before a dry crock pot starts blazing. And, because I only installed an "off" tripper, it will never start up the crock pot again on its own. Other timers that have trippers have trippers that are all the same. If I used one of those, then the timer would turn off but it would also start up the crock pot the next day when that tripper was encountered in the next 24 hour cycle. I like to slow cook meats over 12 or more hours and I put it out in the garage so it doesn't stink up the house. (Lots of spices, chilis, and onions slow cooking over many hours can impregnate your drapes, carpets, and woodwork with aromas that won't go away for days and days...so I put it in the garage.) I could certainly envision a day when I set the food to cook, but I would get called away on a late night job, It would be just like me to come home tired, go to bed, and forget entirely about the food cooking in the garage. In good weather, I'll park my car outside. It could be days and days before I remember the food in the crock pot out in the garage. With this Intermatic timer, no problem. Fire department didn't have to come. It shut off the crock pot and won't start it up again, and again, and again like other timers would do. These timers will work with inductive, resistive, magnetic fluorescent, and electronic fluorescent, including twistie bulbs. It's got a 15 amp 3 prong outlet. Motor turns the wheel. Simple. Reliable. I like it. The operative logic of such a simple device is bullet proof. What if the power goes out? It starts up again when power is restored. But, oh, you say, your food will be rotten if it's off more than a half hour? No problem, Just look at the wheel when you retrieve your food. You set the wheel for the correct time when you started cooking. If the time is off more than whatever period you think is unsafe to eat? You will know.

### ⭐⭐⭐⭐⭐ Simple, cheap solution to simple appliances without programmable timers
*by M***O on September 24, 2014*

I got this because I have a wall mounted swamp cooler that cannot be programmed to turn on or off. (I first heard about this device from reviewers that owned food dehydrating machines that did not come with an automatic off option, and they would remedy it by plugging in dehydrator into a timer and set it to turn off after set hours). This is simple, yet useful. The timer on the dial is not accurate to the "T" but it's close enough and good enough. I got tired of coming out to the living room in the middle of the night, shivering, because the swamp cooler would get our house too cold by 2am, but it's just too hot here in the evening (bedtime) to shut it off, and this was the solution for me. I only need one set of red and green for now; have it go off at 1am-ish and come back on at 9:30-ish in the morning.. (Not to mention there's the on and off switch on top in case I just want to shut it down) but during the winter when I am not using the swamp cooler I may use this for some other appliance.. not sure what yet. As of writing this review I had this unit for 3 months and it's been working without failure. Also, I like that it directs the plug to the side to the right (as you can see in the pic) so that it would make whatever plug fit behind furniture or tight spaces. If there's only thing that makes me question it, is when it goes from off to on, I see a contained, but visible static spark sort of inside the dial up on top. I'm not sure if that's just normal or a hazard since I'm not an electrician. I will post that question on the review page and see what others say.

### ⭐⭐⭐⭐⭐ Reliable!
*by J***D on November 29, 2025*

These are very reliable timers. I’ve used them for 5 years with no problems.

## Frequently Bought Together

- TN311 Heavy-Duty 24-Hour Indoor Mechanical Plug-in Timer - Efficient Control for 2 Devices, Customizable Scheduling - Timer for Lighting, Fans & Small Appliances
- Intermatic Cycle Timer Clock ON/Off Plastic Switch Trippers - TN, PB, TB Series, 4 Red, 4 Green
- Intermatic TN111K 15-Amp Indoor Timer - Versatile 24-Hour Control - Easy Manual Override and Single 2-Prong Design (1 Pack)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.sg/products/1048998-tn311-heavy-duty-24-hour-indoor-mechanical-plug-in-timer](https://www.desertcart.sg/products/1048998-tn311-heavy-duty-24-hour-indoor-mechanical-plug-in-timer)

---

*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-03-07*