SELC One Part Photocell 8481

    • Accurate omnidirectional ambient light sensing photocell
    • Relay Assisted Triac (RAT) switching up to 1800VA, 1000W
    • IP67 sealed enclosure when fitted
    • DIAKON™ acrylic conical cover ensuring good ambient light transmission during lifetime
    • State-of-the-art micro-controlled circuitry for control of sensing time delays
    • All SELC photocells are fitted with mains transients suppressors so as to increase both the life of the photocontrol and luminaire
    • One part – easy to install
    • > 25 years life expectancy




      Operating Voltage 105 to 305 volts 50/60 Hz
      Load Rating 1800VA, 1000W
      Load Current Continuous 16 amps, 50/60 Hz AC
      Load Current (inrush) 168 amps, 60 Hz 1 cycle
      Switch Type Relay Assisted Triac (RAT)
      Switch On Light Level 3 fc standard, other light levels on request
      Switch ON : Switch OFF 1:0.5 (inverse ratio) standard, other ratios on request
      Switch On Time Delay 20 seconds standard, other time delay settings on request
      Switch Off Time Delay 20 seconds standard, other time delay settings on request
      Light Detection Sensor Silicon integrated photodiode and amplifier with spectral and angular response approximating that of an accurate colour-corrected cosine photometer
      Weathering Performance <1% decrease in light transmission over 6 years
      Power Consumption < 350mW nominal @ 230V AC
      Surge Protection 320 volt, 320 joule (2ms) Metal Oxide Varistor (Note: Other MOV ratings incorporated if requested)
      Operating Temperature -40˚F to +158˚F (-40˚C to + 70˚C)
      Enclosure Material DIAKON™ acrylic
      Enclosure Sealing IP67 (EN 60529) When fitted
      Manufacturing Standard IS EN ISO 9001:2008


      10 years (subject to SELC Terms & Conditions)
      Fail-on/Fail-off Must be specified in advance
      Note ANSI C136.10 does not specify an enclosure colour for a fail-off control with a 105–305 Voltage range

      The SELC 8481 Photocell is suitable for use on mains power systems operating between 105-305 Volts (50/60 Hz).

      The patented Relay Assisted Triac (RAT) switching technique has been employed successfully in photocontrols by SELC Ireland Limited for many years. The International approved Test House at Milton Keynes in the United Kingdom has tested the RAT switch for thirty thousand switching cycles, switching 3 x 400W high pressure sodium lamps + gear incorporating 135uF total load capacitance.

      Each cycle consisted of 2 minutes ON followed by two minutes OFF. No deterioration in performance was observed after completion of the tests.

      DIAKON™ acrylic has excellent weathering properties in transparent form and shows little, if any, degradation of transparency under conditions of intense sunlight over long periods of time.

      Range Applications

      • Street and road lighting
      • Security and floodlighting
      • Amenity and sign lighting
      • All type of industrial and consumer external lighting
      • All types of HID and LED lighting (Maximun HID load is 1800VA, 1000W)
      • Other loads that utilise dusk to dawn as the switching method

      Highest quality design, manufacture and test techniques employed

      All products tested 100% x 3

      • 100% Electrical test
      • 100% Burn-in
      • 100% Final inspection