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Gray die-cast zinc photocontrol with stem mount

Intermatic

Intermatic K4421M Photocontrol Stem 120V 1800W

SKU CH-SSZK-FPM2M

A 120 V AC stem-mount photo control switches loads up to 1,800 W from dusk to dawn in a raintight die-cast zinc housing

  • typePhoto Control
  • materialHAWA
  • weight0.52
  • Automatic dusk-to-dawn lighting control with 1.0 to 5.0 foot-candle activation
  • Handles up to 1800 watts for 120V AC circuits
  • Raintight die-cast zinc housing rated from -40 to 158 degrees F
  • cCSAus and UL listed meeting California Title 20 standards
  • Includes lock nut and washer gasket for secure stem mounting

Photocontrol Stem 120V 1800W

The Intermatic K4421M is a stem-mounted photocontrol designed for outdoor lighting circuits. It switches loads automatically from dusk to dawn at 120V AC with a maximum rating of 1800W. The unit suits contractors and facility managers who need reliable dusk-to-dawn operation for area or security lighting.

Raintight enclosure with lock nut included

The device mounts through a standard knockout using the supplied lock nut and washer gasket. Its die-cast zinc housing and raintight enclosure protect the SPST contacts in temperatures from -40 to 158 degrees F. Wiring errors such as exceeding 15A incandescent or 8.3A ballast loads will cause premature contact failure.

Verify voltage and load type before ordering

Confirm the supply is 120V AC and that the connected load does not surpass the 1800W maximum. The turn-on range is 1.0 to 5.0 foot-candles and turn-off is 3 to 15 foot-candles, so ensure the mounting location matches the desired ambient threshold. The product carries cCSAus and UL listings and complies with California Title 20.

Highlights

  • Automatic dusk-to-dawn lighting control with 1.0 to 5.0 foot-candle activation
  • Handles up to 1800 watts for 120V AC circuits
  • Raintight die-cast zinc housing rated from -40 to 158 degrees F
  • cCSAus and UL listed meeting California Title 20 standards
  • Includes lock nut and washer gasket for secure stem mounting

Specifications

BrandIntermatic
typePhoto Control
materialHAWA
weight0.52

Questions about this item

How do I confirm the K4421M is switching correctly after installation?

After dusk the connected load should power on; at dawn it should turn off. The SPST contact opens at 3 to 15 foot-candles off and closes at 1.0 to 5.0 foot-candles on, so the light will follow that cycle.

What comes with the K4421M and what must I supply?

The unit includes a lock nut and washer gasket for stem mounting. You must provide 120 V AC wiring, a suitable junction box and the lighting load not exceeding 1800 W incandescent or 8.3 A ballast.

Which rating should I choose for a 120 V circuit with mixed lighting?

Select the K4421M rated 120 V AC, 1800 W maximum incandescent (15 A) and 8.3 A ballast. It meets cCSAus, UL Listed and California Title 20 for that voltage and wattage range.

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