Intermatic - K4121C - Stem Mount Thermal Photocontrol, 120 V

IntermaticSKU: K4121C

Sale price $15.86
In stock


Spec Sheet  Install Manual

These photocontrols install on standard outdoor light fixtures and electrical boxes with 1?2"-14 NPSM thread or 7?8" knock-out holes for dusk-to-dawn ON/OFF control of outdoor lighting.


  • Mechanical bimetal switch with Cadmium Sulfide photocell
  • Delay feature prevents unwanted OFF switching
  • Gray plastic housing
  • 1?2"-14 NPSM threaded stem
  • Washer gasket and locking nut included
  • #18 AWG, 9" wire leads


  • Outdoor Lighting Control


Input Voltage Range(s) 120 VAC, 50/60 Hz Usage Environments Outdoor
Photocontrol Style Stem Mount Warranty Period 2-Year limited
Wiring Option Wire leads Application Compatibilities Fluorescent, HID, Incandescent
Activation Off 3 to 15 fc Activation On 1 to 5 fc
Category Fixed Mount Thermal Photocontrols Web Cover Color Gray
Fail Mode ON Housing Material Polycarbonate
Magnetic Ballast (NO) 8.3 A, 1000 VA Magnetic Ballast Range(s) 8.3 A, 1000 VA
Photo Control Switch Type Mechanical Bimetal Photocell Type Cadmium Sulfide
Photocontrol Sensor Location Side Photocontrol Type Thermal
Rating General Purpose, Weather Resistant Sensor Time Delay 30 sec to 90 sec
Tungsten (NO) 15 A, 1800 W Tungsten Range(s) 15 A, 1800 W
UL Standard UL773 Wire Size Max #18 AWG
Operating Temperature Max (°C) 70 Operating Temperature Max (°F) 158
Operating Temperature Min (°C) -40 Operating Temperature Min (°F) -40
Product Depth (in) 1 9/16 Product Depth (mm) 39.7
Product Height (in) 3 Product Height (mm) 76.2
Product Width (in) 1 9/16 Product Width (mm) 39.7
Unit Carton Height (in) 4.88 Unit Carton Length (in) 3
Unit Carton Weight (lb) 0.21 Unit Carton Width (in) 1.75

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