High-capacity DC lighting dimmer for marine and mobile lighting systems

Controls the brightness of higher-load DC lighting circuits across boats, motorhomes, caravans and coaches. The electronic switchmode design supports compatible filament lamps including incandescent, halogen and xenon lighting, while the compact marine-grade enclosure incorporates efficient heat dissipation and protected electrical connections for demanding installations.

Key Features

  • High-capacity lighting control: Supports higher-power DC lighting circuits with continuous load ratings suitable for both 12V and 24V systems.
  • Variable dimming: Provides adjustable output from 10% to 98% of input voltage for flexible control over lighting levels.
  • Brightness memory: Records the selected brightness when the lights are switched off and restores the same setting when switched back on.
  • Soft start operation: Limits start-up inrush current to help extend the operating life of compatible filament lamps.
  • Self-diagnostics: Tri-colour LED provides status indication for standby mode, connected load, short circuit and over-temperature conditions.
  • Integrated protection: Incorporates short-circuit, excessive-temperature and internal fuse protection for the electronics.
  • Temperature failsafe: Automatically reduces the lighting circuit to 50% of rated load if excessive temperature is detected.
  • Master/slave functionality: Selectable master/slave operation allows multiple dimmers to be connected in parallel where additional lighting capacity is required.
  • Marine-grade construction: Features an anodised marine-grade aluminium enclosure with electrical-grade end caps and a temperature-resistant terminal cover.
  • Flexible switching: Operates from a normally open momentary push switch and supports multiple switches within the same lighting circuit.

Suitable for higher-capacity DC lighting installations requiring adjustable brightness, diagnostic monitoring and integrated circuit protection. Parallel operation provides additional flexibility for larger lighting systems where multiple dimmers are required.

Continuous Load Rating at 30°C 250W at 13.0V DC / 500W at 26.0V DC
Input Voltage Range 9–33V DC
Dimming Voltage Range 10–98% of input voltage
Standby Current Draw <10mA
Operator Single pole momentary push switch (normally open); multiple switches can be used
Operating Temperature -25°C to +45°C
Operating Humidity Ideally less than 90%
Enclosure Material Marine-grade aluminium, dye anodised
End Cap Material Injection moulded electrical-grade ABS/PC plastic
Terminal Cover Material Extruded temperature-resistant ABS
Diagnostic Indicator Tri-colour LED – monitoring standby mode, load on, short circuit and temperature
Transient Voltage Protection Purpose-designed filtering circuit
Short Circuit Protection Current sensing circuit – shutdown with automatic reset
Over-Temperature Protection Temperature sensing circuit – foldback to 50% of rated load with automatic reset
Output Circuit Configuration Common negative wiring, switching positive
Power Termination 6-32 UNC heavy-duty screw terminal
Auxiliary Termination Euro terminal block
Master/Slave Selection Selectable slide switch located next to auxiliary terminal
Length 170mm
Width 80mm
Height 40mm
Weight 350g
Conformity AS/NZS CISPR 11, EN55011, CISPR11, IEC61204-3
Certification Australian C-Tick, European CE
SKU ITV.SLD2550DC
Model # SLD2550DC
Brand Intervolt
Shipping Weight 0.2500kg
Shipping Width 0.140m
Shipping Height 0.040m
Shipping Length 0.080m
Shipping Cubic 0.000448000m3
Unit Of Measure ea

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