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by NSI

NSI Industries E103B 24 Hour Time Switch, Multipurpose Control, 120-277 VAC Input Supply, 1 Channel, DPST Output Dry Contact

2 customer reviews

Price: $100.96 & FREE Shipping. Details
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Specifications for this item
Brand Name NSI
EAN 0786261824110
Enclosure NEMA 3R
Number of Items 1
Operating Frequency 60  Hz
Part Number E103B
Size #8 - #16 AWG
Specification Met UL listed
Style Name DPST
Temperature Range -40 to 149  Degrees Fahrenheit
UNSPSC Code 32101519
UPC 786261824110

This NSi Industries E103B digital time switch accepts 120-277 VAC input and... Read full product description

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Product Features

  • Automatic on/off control for operation at same time each day
  • Digital 24-hour display with up to 20 on/off cycles each day, one-minute minimum cycle, manual override switch
  • Automatic compensation for daylight saving time and leap year
  • 120-277 VAC input voltage for multiple uses
  • Noryl plastic alloy indoor/outdoor enclosure with locking hasp

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Product Details

  • Shipping Weight: 1.6 pounds (View shipping rates and policies)
  • ASIN: B00435KP3K
  • Item model number: E103B
  • Average Customer Review: 3.0 out of 5 stars  See all reviews (2 customer reviews)
  • Amazon Best Sellers Rank: #84,857 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

Product Description

This NSi Industries E103B digital time switch accepts 120-277 VAC input and its DPST output contacts can activate a 40 amp load or 2 hp motor. The switch automatically detects the input voltage and does not require manual voltage setting. This multipurpose timer includes 20 pairs of on/off set points, has a minimum cycle time of one minute, and is suitable for use where on/off operation is required at the same time each day. This timer can adjust for daylight saving time and leap year. A rechargeable super capacitor provides four days of backup power to maintain time and schedule settings. The double-pole single-throw (DPST) contacts are housed within a Noryl plastic alloy enclosure that meets NEMA-3R standards for water resistance and has a lockable hasp. The enclosure is suitable for indoor and outdoor use and mounts to an external surface. This digital timer is Underwriter Laboratories (UL) Listed and Canadian Standards Association (CSA) certified for quality assurance and is suitable for controlling lighting, heaters, and equipment motors.


Switch typeDigital 24-hour timer with 20 set points each day
Input power supply120-277 VAC, 50/60 Hz, 6 W power consumption, rechargeable super capacitor backup, automatic voltage detection
Output contactsDPST contacts, 30 amp resistive, 40 amp inductive load rating, 2 hp motor load rating
On/off controlOne-minute minimum on/off cycle, up to 20 cycles per 24 hours
EnclosureNEMA-3R Noryl plastic alloy enclosure with clear Lexan cover, indoor/outdoor use, external surface mount
Terminal wire size range#8 to #16 AWG (American wire gauge)
Operating temperature range-40 to +149 degrees F (-40 to +65 degrees C)
Standards metUL Listed, CSA certified

Automatic switches are used to turn on or off electrical devices and are activated by time, light, and motion. Time activated switches (also known as timers) operate at preset time intervals during a daily or weekly period and can be either mechanical or electronic. Mechanical timers feature a dial with multiple pins to set the on/off time intervals. Electronic timers feature an LCD display and pushbuttons to set the time intervals. Light activated switches (also known as optical or photo) operate when ambient light levels reach preset values, generally measured in foot candles. Motion-activated switches (also known as motion sensors) operate when an electronic field of a preset range is interrupted. These switches can include energy saving logic that uses combinations of time, light, and motion to operate and can include one or more device outlets or circuit contacts. Automatic switches are used to control indoor lights, outdoor lights, appliances, and small equipment motors.

NSi Industries manufactures electrical components and sensors, lighting products, and energy management products. The company, founded in 1975, is headquartered in Huntersville, NC.

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Most Helpful Customer Reviews

By Ben H. on September 13, 2014
Verified Purchase
This timer replaced a mechanican timer on my pool pump. It was easly to install and programing it was a snap.
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By Jeffrey L Tisdel on November 13, 2015
Verified Purchase
Broken upon receipt
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