Intermatic - K4021C - Button Thermal Photocontrol, 120 V

IntermaticSKU: K4021C

Sale price $13.89
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Spec Sheet  Install Manual

These photocontrols install within lighting fixtures, post lamps, or in-wall boxes to provide dusk-to-dawn ON/OFF control of outdoor lighting.


  • Mechanical bimetal switch with Cadmium Sulfide photocell
  • Compact size fits into standard outlet box, post lamp, wall pack and other lighting fixtures
  • Delay feature prevents unwanted OFF switching
  • 3/8"-18 NPSM, 3/4" long stem with locking nut and washer gasket


  • Outdoor Lighting Control


Input Voltage Range(s) 120 VAC, 50/60 Hz Usage Environments Outdoor
Photocontrol Style Button 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
Basic Delivery Free to Customer Yes Basic Delivery Free to Installer Yes
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 Front Photocontrol Type Thermal
Rating General Purpose SO Customer Ship Surcharge 0.00
SO Installer Ship Surcharge 0.00 SO Store Ship Surcharge 0.00
Sensor Time Delay 30 sec to 90 sec Ship to Customer Delivery Option 99 - Manually Assign
Ship to Installer Delivery Option 99 - Manually Assign Ship to Store Delivery Option 99 - Manually Assign
Tungsten (NO) 15 A, 1800 W Tungsten Range(s) 15 A, 1800 W
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) 13/16
Product Depth (mm) 20.6 Product Height (in) 1 13/16
Product Height (mm) 46 Product Width (in) 15/16
Product Width (mm) 23.8 Unit Carton Height (in) 4.88
Unit Carton Length (in) 3 Unit Carton Weight (lb) 0.25
Unit Carton Width (in) 1.75

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