Intermatic K4221C Stem and Swi...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$80.87
$25.76
Intermatic K4221C Stem and Swivel Mount Thermal Photocontrol, 120 V

Intermatic K4221C Stem and Swivel Mount Thermal Photocontrol, 120 V

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Model: K4221C
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$80.87
$25.76
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Stem and Swivel Mount Thermal Photocontrol, 120 V

  • Features

    • Washer gasket and locking nut included
    • Mechanical bimetal switch with Cadmium Sulfide photocell
    • Delay feature prevents unwanted OFF switching
    • High strength, UV resistant plastic housing
    • #18 AWG, 6" wire leads
    • NA
    • Swivel with 1,2"-14 NPSM threaded stem

Manufacturer Resources

Product Specs

Application:
Outdoor Lighting Control
Country Of Origin:
Mexico
Input Voltage Rating Range S :
120 VAC, 50/60 Hz
Marketing Description:
These photocontrols are provided with a swivel arm for easy and flexible installation to standard o
Product Color:
Grey
Product Height:
5 in
Product Length:
NA NA
Product Weight:
NA lbs
Product Width:
1.563 in
Warranty Period:
2-Year limited
Product Depth:
1.563 in

Intermatic K4221C – Frequently Asked Questions

1) What voltage is the Intermatic K4221C photocontrol rated for?
The K4221C runs on 120 VAC, 50/60 Hz. It is a single-voltage device, so it won't work on a 208-277 V line or on a multi-tap circuit. Wire it to a 120 V branch feeding the fixture you want switched.
2) Will a passing car or a nearby light turn the Intermatic K4221C off during the night?
No. The K4221C uses a mechanical bimetal switch with a cadmium sulfide photocell and a built in time delay that blocks unwanted OFF switching from brief light hits like headlights or lightning. That delay is the main reason to pick a thermal photocontrol for street, parking lot and yard lighting.
3) What wire leads come on the Intermatic K4221C and how do I connect it?
It ships with #18 AWG, 6 inch wire leads, so you splice it in with wire nuts inside the fixture housing or junction box rather than landing it on screw terminals. Six inches is short, plan for the splice to sit right at the hub. It is a 120 V load switching control, so it wires in series with the lamp's hot leg.
4) Is the Intermatic K4221C photocontrol housing OK for full outdoor exposure?
Yes, it is built for it. The housing is high strength UV resistant plastic in grey, and the unit is intended for outdoor lighting control. The included washer gasket seals the stem where it enters the fixture or box, which is where water gets in on this style of control.
5) How much room do I need above the fixture for the K4221C photocell?
Allow about 5 inches of height, with a body roughly 1.563 inches across in both depth and width. On a post top or wall pack, check you have that clearance plus swing room for the swivel before you drill or thread it in.
6) What is the exact part number and who makes the K4221C photocontrol?
Intermatic, manufacturer part number K4221C, a 120 V stem and swivel mount thermal photocontrol. It is made in Mexico. That MPN is what to quote for reorders so you get the 120 V stem version and not another voltage or mounting style in the family.
How fast can I get the Intermatic K4221C delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Intermatic K4221C come with a warranty?
Absolutely. The Intermatic K4221C is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Intermatic K4221C?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Intermatic K4221C from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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