The EJ500 Astro In-Wall Timer allows up to 14 ON/OFF events per week, with an astronomic feature that that automatically adjust to sunrise/sunset. The timer also features an auto daylight saving time adjustment, and is single-pole or 3-way compatible for ease of installation. The timer can replace any standard wall light switch.

  • Series Overview
  • Model Lineup
  • Specifications
  • Resources

  • Up to 14 ON/OFF events per week
  • No neutral required
  • “Random” setting turns light ON and OFF at slightly different times each day
  • Auto Daylight Saving Time adjustment
  • Astronomic feature auto adjusts to sunrise/sunset
  • Controls incandescent lighting
  • Battery backup guards against memory loss
  • Single-pole or 3-way compatible

Product Ratings
ModelSwitch TypeInput VoltageSwitch RatingNeutral RequiredStyleTemperature RatingWarranty
EJ500Single-Pole or 3-Way Compatible120 VAC, 60 Hz40-500 Watts IncandescentNoFor use with Standard or Decorator Style Switch Plate32ºF to 104ºF (0ºC to 40ºC)1 Year


Switch Type:                          Single-Pole or 3-Way

Switch Ratings:

Tungsten (incadescent):       4 Amp, 120VAC, 500 Watts (single-gang or two-gang)

Input Voltage:                       120 VAC, 60 Hz

Style:                                     For use with decorator type switch plates

Warranty:                              Limited 1 year

Dimensions:                          2.75" H x 1.73" W x 1.63" D

New Product Highlights


The Intermatic® line of occupancy sensors are engineered and tested for long-lasting performance. In-Wall and Ceiling Mount sensors in both PIR (infrared) and dual (PIR/ultrasonic) technologies can monitor virtually any area within a building, providing solutions for any retrofit or new construction project. They utilize zero-crossing technology to suppress inrush current impact, supplying reliable ON/OFF sensing no matter the lighting technology.


The Intermatic® ICUBE™ Adaptive Defrost Module cuts defrost cycles--and utility bills--for the food service industry. Designed by Grässlin by Intermatic for commercial walk-in coolers and freezers, the smart-sensing technology behind the ICUBE™ continuously monitors evaporator coil temperatures and only allows defrosting when necessary at the next programmed timer interval.

Surge Protective Device Group Shot

The Intermatic® Surge Protective Device with Consumable Modules covers 100% of a home’s big investment equipment, from appliances and computers, to HVAC equipment and TVs. The Surge Protective Device uses replaceable Consumable Modules that allows homeowners to easily and safely replace a module when the built-in LED light indicates it has been compromised.