INTERMATIC Button Thermal Photocontrol 120 V, Model K4021C
INTERMATIC Button Thermal Photocontrol 120 V, Model K4021C
Pickup available at Independent Electric Supply
Usually ready in 4 hours
The Intermatic K4021C is a 120V button-style thermal photocontrol designed for professional electricians and contractors who need dependable dusk-to-dawn switching on outdoor lighting installations. Its compact button form factor makes it a natural fit for post-top lanterns, wall packs, and decorative fixtures where a low-profile mount is preferred. The mechanical bimetal switch paired with a front-mounted Cadmium Sulfide (CdS) photocell delivers proven, field-tested performance, while the built-in sensor time delay prevents nuisance tripping from passing headlights or brief cloud cover — reducing callbacks and keeping installations running exactly as intended.
Specifications
| Input Voltage | 120 VAC, 50/60 Hz |
| Mounting Style | Button |
| Stem Size | 3/8" diameter, 3/8"-18 NPSM thread |
| Switch Type | Mechanical Bimetal, SPST |
| Photocell Type | Cadmium Sulfide (CdS), Front-mounted sensor |
| Activation (Turn ON) | 1 to 5 fc |
| Activation (Turn OFF) | 3 to 15 fc |
| Sensor Time Delay | 30 sec to 90 sec |
| Fail Mode | ON |
| Compatible Lamp Types | Fluorescent, HID, Incandescent |
| Incandescent / Tungsten Load | 15 A / 1800 W |
| Magnetic Ballast Load | 8.3 A / 1000 VA |
| Housing Material | Polycarbonate (UV resistant) |
| Colour | Grey |
| Usage Environment | Outdoor |
| Operating Temperature | -40°C to 70°C (-40°F to 158°F) |
| Wire Leads | #18 AWG |
| Certifications | cULus, cCSAus, Green Energy, Title 20 |
| Country of Origin | Mexico |
| Warranty | 2-Year Limited |
