Twist Lock Electronic Photocontrols

Electronic Photo Controls-Twist Lock

  • Series Overview
  • Model Lineup
  • Specifications
  • Resources

Designed for Long Life

  • Improved ON/OFF switching with high quality relays
  • Zero-crossing electronic circuitry for extended life (LED and EK models)
  • Employs electronic components exclusively selected to meet extended life targets
  • Conformal coated PCB assemblies for long term (LED and EK models)

Tested for Long Life

  • Products tested to full ON/OFF lifecycles under tungsten, magnetic and electronic ballast loads
  • Electronic ballast testing per NEMA 410 to ensure compatibility with today’s array of electronic ballasts and drivers

Warrantied for Long Life

  • 6, 8 and 12-year warranties
  • Intermatic brand assurance for peace of mind and trouble-free implementation

More Features

  • High load ratings for multi-fixture installations for each photo control
  • Enhanced surge protection with 510 J MOV
  • Meets or exceeds ANSI C136.10 and UL/CSA requirements

Compatible with

Induction      HID

Product Ratings
LED Compatibility
CA Title 20 Listed
ModelVoltageTungstenMagnetic BallastElectronic BallastTurn ON LevelOFF ON RatioFail ModeWarranty
LED4536SC105-305 VAC1000 Watts1800 VA8 Amps1.5 fc1.5:1ONLimited 12-year manufacturer's warranty
EK4536105-305 VAC1000 Watts1800 VA6 Amps1.5 fc1.5:1ONLimited 8-year manufacturer's warranty
ELC4536105-305 VAC1000 Watts1800 VA2 Amps1.5 fc1.5:1ONLimited 6-year manufacturer's warranty
Voltage: 105-305 VAC, 50/60Hz 
Tungsten: 1000 Watts 
Ballast: 1800 VA
Activation Type: Instant ON – 2-5 Sec. Delay OFF
Light Level: 1.2-3 FC ON; 2- 5 FC OFF

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.