Intermatic Metal Stem Mount Th...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$91.53
$37.13
Intermatic K4421M Metal Stem Mount Thermal Photocontrol, 120 V

Intermatic Metal Stem Mount Thermal Photocontrol 120V with Delay Feature

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Model: K4421M
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$91.53
$37.13
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Intermatic Metal Stem Mount Thermal Photocontrol 120V with Delay Feature

Professional Outdoor Lighting Control with Thermal Protection

The Intermatic Metal Stem Mount Thermal Photocontrol delivers reliable automatic lighting control for outdoor applications. This 120V photocontrol features a mechanical bimetal switch with Cadmium Sulfide photocell, die-cast metal housing construction, and integrated delay feature to prevent unwanted switching. The unit includes a 1�2"-14 NPSM threaded stem with washer gasket and locking nut for secure installation on standard outdoor light fixtures and electrical boxes.

Professional Features & Benefits

  • 120V AC Operation: Compatible with standard residential and commercial voltage systems for versatile outdoor lighting applications.
  • Thermal Bimetal Switch: Provides temperature-compensated switching operation for consistent performance across varying weather conditions.
  • Delay Feature: Prevents unwanted OFF switching caused by temporary light sources like vehicle headlights or lightning.
  • Die-Cast Metal Housing: Ensures long-lasting durability and weather resistance for outdoor installations.
  • Standard Threaded Stem: 1�2"-14 NPSM threading provides secure mounting compatibility with most outdoor fixtures.
  • Pre-Wired Leads: #18 AWG, 9" wire leads simplify installation and electrical connections.
  • 2-Year Limited Warranty: Backed by manufacturer warranty for reliable long-term performance.

Technical Specifications

  • Applications: Outdoor Lighting Control
  • Country Of Origin: Mexico
  • Depth: 1.563 in
  • Input Voltage Rating Range S : 120 VAC, 50/60 Hz
  • Marketing Description: These photocontrols install on standard outdoor light fixtures and electrical boxes with 1�2"-14 NP
  • Product Color: Gray
  • Product Height: 3 in
  • Product Length: NA NA
  • Product Weight: NA lbs
  • Product Width: 1.563 in
  • Warranty Period: 2-Year limited

Professional Applications

  • Residential Outdoor Lighting Systems
  • Commercial Building Perimeter Lighting
  • Parking Lot and Walkway Illumination
  • Security Lighting Applications
  • Landscape and Architectural Lighting
  • Industrial Facility Exterior Lighting

Why Choose Intermatic Quality?

Intermatic photocontrols provide dependable automatic lighting control with proven mechanical bimetal technology and die-cast metal construction. The 2-year limited warranty and gray finish ensure long-term reliability and professional appearance for outdoor lighting installations.

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 install on standard outdoor light fixtures and electrical boxes with 1⁄2"-14 NP
Product Color:
Grey
Product Height:
3 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 K4421M – Frequently Asked Questions

1) Will the Intermatic K4421M photocontrol thread into the 1/2 inch knuckle on my outdoor light fixture?
Yes, if that knuckle is the standard 1/2"-14 NPSM tapping. The K4421M mounts on a threaded metal stem sized 1/2"-14 NPSM and ships with a washer gasket and locking nut, so it goes into standard outdoor light fixtures and electrical boxes with that thread. The gasket seats against the fixture to keep water out of the opening.
2) What voltage does the Intermatic K4421M thermal photocontrol run on, and can I use it on 277V parking lot lighting?
The K4421M is a 120 VAC unit, rated 120 VAC at 50/60 Hz. It is not a multi-voltage control, so do not put it on a 277V circuit. For 277V pole and parking lot lighting you need a photocontrol rated for that voltage or a 120/208-277V multi-tap model.
3) My photocell keeps flicking the parking lot lights off when cars go by. Does the K4421M fix that?
That is exactly what the delay feature on the K4421M is for. The control includes an integrated delay that prevents unwanted OFF switching from temporary light sources such as vehicle headlights or lightning, so the fixture stays on through a passing car instead of cycling.
4) Is the Intermatic K4421M a thermal (bimetal) photocontrol or an electronic one?
Mechanical thermal type. The K4421M uses a bimetal switch paired with a cadmium sulfide photocell, so switching is temperature compensated rather than solid state. Thermal controls like this are the long-standing choice for incandescent and HID outdoor lighting; if you are switching LED drivers or need zero-crossing electronic switching, specify an electronic photocontrol instead.
5) Is the Intermatic K4421M housing suitable for outdoor exposure, or is it a plastic indoor unit?
Die-cast metal housing, gray finish, built for outdoor lighting control. The die-cast shell plus the washer gasket at the stem is what makes it suitable for exterior fixtures on building perimeters, walkways, and pole lighting rather than indoor-only use.
6) How much room does the Intermatic K4421M photocontrol need once it is mounted on a fixture?
The body measures 3 inches in height and 1.563 inches in both width and depth, so it is a compact stem-mount can. Check clearance above the fixture arm or box so the photocell window still sees open sky and is not shaded by the shield or reflector.
7) I'm standardizing photocontrols across a multi-family property. What part number do I reorder for the Intermatic metal stem mount thermal unit?
Order Intermatic K4421M. That is the single model for the 120V metal stem mount thermal photocontrol with the delay feature, so there is no handing, finish, or voltage option to pick, which makes it straightforward to spec repeatedly across a site. Country of origin is Mexico.
How fast can I get the Intermatic K4421M 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 K4421M come with a warranty?
Absolutely. The Intermatic K4421M 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 K4421M?
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 K4421M from ZenSupply?
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