Intermatic EK4136S Nightfox Stem Mount Electronic Photocell 120-277V

Product Overview

The Intermatic EK4136S NIGHTFOX EK Series Premium Stem Mount Electronic Photocontrol provides reliable automatic lighting control for LED, HID, and incandescent fixtures. Designed for permanent installation in outdoor-rated electrical enclosures, junction boxes, and lighting fixtures, this 120–277V electronic photocontrol features a durable stem-mount design, silicon light sensor, and zero-crossing relay technology for dependable dusk-to-dawn operation. Built for long service life, it delivers reliable performance in demanding outdoor environments.

Key Features & Design

• Functionality: Automatically switches lighting ON at approximately 1.5 foot-candles and OFF at approximately 4.5 foot-candles using a non-drift silicon light sensor with IR filter. Features a fail-ON mode and zero-crossing relay circuitry for extended relay life.
• Installation context: Designed for permanent installation in outdoor-rated electrical enclosures, in-wall junction boxes, wall packs, and outdoor lighting fixtures. The 1/2"-14 NPSM threaded stem fits standard outlet boxes with a minimum 7/8-inch mounting hole.
• Notable specifications: Brand: Intermatic; Model: EK4136S; Series: NIGHTFOX EK; Voltage: 120–277V AC; Relay Type: Electronic Relay; Sensor: Silicon Diode; Mounting: Stem Mount; Wire Leads: 6-inch color-coded #18 AWG.
• Contractor-relevant details: Supports LED, HID, and incandescent lighting up to 1,650W at 277V, 15-year design life, over 10,000 switching cycles, conformal-coated PCB, 255J MOV surge protection (5,000A), cULus listed, Title 20 compliant, and backed by an 8-year limited warranty.

Performance / Benefits

The EK4136S automates outdoor lighting based on ambient daylight, reducing energy consumption while eliminating manual switching. Its premium electronic controls, surge protection, and long service life minimize maintenance, making it an excellent solution for commercial buildings, parking areas, security lighting, wall packs, and exterior lighting systems.