Intervolt 9 – 33VDC Lighting Dimmers SLD Mini


The interVOLT range of SLD electronic DC lighting dimmers provide an excellent solution for the dimming of conventional (filament) lamps as well as compatible LED devices.


The dimming of onboard lighting in boats, RVs, caravans and coaches at an affordable price has always been an issue. The SLD Series overcomes this with a feature packed design, not only presenting great value, but ensuring reliability, longevity and safety.

The SLD range of dimmers include single and two channel versions all housed in interVOLT’s unique Mini Series enclosures which are not only stylish but compact, efficient and installer friendly. The single channel range can be paralleled to increase load capability and controlled from a single momentary switch. A selector switch allows the first dimmer to act as the master device with any subsequent dimmer connected as a slave.


  • Diagnostics
    Unique to interVOLT, is the self diagnosing electronics. This design provides valuable feedback to installers and operators alike. An LED displays the system status and will indicate standby power, lamp load connected (lights on), over temperature and output short circuit. 
  • Protection
    interVOLT dimmers feature a host of devices designed to protect the electronics from various connection and application problems. The dimmers are protected against, short circuit, over temperature and an internal fuse protects the electronics in the event of component failure. 
  • Memory
    All interVOLT dimmers have an integrated device which stores data for various functions including the memory feature. The memory function records the current ‘brightness’ setting when the lights are switched off, so that same ‘brightness’ is resumed when turned on again.

Intervolt 9 – 33VDC Lighting Dimmers SLD Mini Specifications

  • Model No. SLD2040DC, SLD2550DC
  • Continuous Load Rating @ 30°C (86ºF) 200 Watts @ 13.0VDC or 400 Watts @ 26.0VDC, 250 Watts @ 13.0VDC or500 Watts @ 26.0VDC
  • Length Overall 120mm (4.725”), 170mm (6.690”)
  • Width Overall 80mm (3.150”), 80mm (3.150”)
  • Height Overall 40mm (1.575”), 40mm (1.575”)
  • Weight 250 grams (8.80 oz), 350 grams (12.35 oz)
  • InputVoltage Range 9 – 33VDC
  • 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 Filtering – Purpose designed circuit
  • Short Circuit Protection Current sensing circuit – Shutdown (automatic reset)
  • Over Temperature Protection Temperature sensing circuit – Foldback to 50% of rated load (automatic reset)
  • Output Circuit Configuration Common negative wiring (switching positive) for ease of installation
  • Termination Power – 6-32 UNC H/D screw terminal. Auxiliary – Euro terminal block
  • Master/Slave Selection Use selectable slide switch. Located next to auxiliary terminal
  • Conformity EMC – Australian AS2064 and European EN50081-1 / EN50082-1
  • Certification EMC – Australian C Tick mark and European CE mark
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About Intervolt

Since 1989, Amelec Australia has been a major importer and distributor of specialised electrical and electronic equipment, including Intervolt products, for the marine and automotive industries.

In the year 2000, Amelec recognized the need for high quality, marine grade, voltage converters to service the 24V - 12V DC power conversion market. Unable to source a suitable product from Australia or overseas, we embarked on an ambitious project to develop and produce our own range for the commercial marine market.  Our first interVOLT product, the Maxi SVC Series was born and introduced to the market in May 2001.

Since then, Amelec have introduced our acclaimed range of DC-DC Power Conditioners, Battery Equalisers, Voltage Stabilisers and Lighting Dimmers in both Maxi and Mini Series.

We are housed in our new R&D centre in Western Australia and continue with the design and development of exciting and innovative projects for the specialised DC market. With the new projects we have under development and our philosophy to maintain quality-at-value products we are confident of interVOLT becoming an international name in the power management and conversion market in the near future.