Intermatic K4321C 120 VAC 50/60 Hz 1800 W Fixed Position Mount Thermal Photocontrol
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Manufacturer Intermatic
Mfg Catalog # K4321C
QED Part # 138088

Features & Applications


  • K4321C includes weatherproof wall plate and neoprene gasket
  • 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, ¾" long stem with locking nut and washer gasket


  • Exterior Lighting
  • Street Lighting
  • Parking Lot
  • Pedestrian Pathway
  • Landscape Lighting


  • Photocontrol Style: In-Wall
  • Photocontrol Sensor Location: Front
  • Inductive: 8.3 A, 120 VAC, 50/60 Hz
  • Incandescent Load Ratings: 15 A, 120 VAC, 50/60 Hz
  • Activation Off: 3 to 15 fc
  • Activation On: 1 to 5 fc
  • Sensor Time Delay: 30 sec to 90 sec
  • Wire Lead Length (in): 9
  • Wire Lead Length (mm): 228.6
  • 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
  • Cover Color: Gray
  • Housing Material: Polycarbonate
  • Product Weight (kg): 0.136
  • Product Weight (lbs): 0.299
  • Product Height (in): 1 13/16
  • Product Height (mm): 46
  • Product Width (in): 15/16
  • Product Width (mm): 23.8
  • Product Depth (in): 13/16
  • Product Depth (mm): 20.6
  • Warranty: 2-year limited
  • Fail Mode: ON

Documents & Downloads

Product Rating

Related Accessories and Parts

  • 6LV1352: Light Shield for Button Photocontrol (K4000 Series, K4321, K4400 Series, EK4036S, EK4336S, EK4436SM)
  • K43-WP-KIT: Wall Plate Kit (for Button – K4000 Series, EK4036S)


Long Description These photocontrols install within lighting fixtures, post lamps, or in-wall boxes to provide dusk-to-dawn ON/OFF control of outdoor lighting.
GTiN 00078275002036
Warranty Length 2 yr
Width 15/16 in
Size 1-13/16 LENGTH X 1-5/16 WIDTH X 1-9/16 DEPTH IN, 4.6 LENGTH X 3.3 WIDTH X 4 DEPTH CM
Color Gray
Operating Temperature 158 degrees F
Type Cuboid, Thermal, Light/Dark
Material Plastic
Applications Dusk to Dawn Lighting Control
Mounting Type Button Fixed Mount
Depth 13/16 in
Height 1 13/16 in
Weight 0.299 lb
Standard C/US Approval,CAS Approval,CSA,California Title 24 Compliant,Title CA 20 Listed
Frequency 50/60 Hz
Connection Type Color Coded Lead
Temperature Rating -40 to 70 C
Family Brand Name Intermatic
Enclosure Type NEMA 3R
Power Rating 1800 W
TC Connection Color Coded Lead
Wire Length 228.6 mm
Power Consumption 1 W
Max Operating Temperature 158 degrees F
Blade Dimensions 70 mm W x 114 mm H
Min Operating Temperature -40 degrees F
Max Wire Size 18 AWG
Voltage 120 VAC

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