Alfatronix Ltd, Fit and Forget - Converters and Power Supplies for the Communications, Automotive and Marine Industries

DD Series 12-24V UP Voltage Converters

  • DD12-24 400
    DD12-24 400
  • DD12-24 600
    DD12-24 600
  • DD12-24 072
    DD12-24 072
  • DD12-24 168
    DD12-24 168
  • DD12-24 240
    DD12-24 240
  • DD12-24 600-RU
    DD12-24 600-RU

NEW 400W and 600W 12-24V units

The latest addition to the range includes two high current (17 and 25Amps output) units.  These use state of the art designs with efficiency up to 93% and practically all components mounted using computer controlled surface mount technology (SMT).  The result is a robust product with low component mass.  The mechanical aspects include a brand new casing profile designed for maximum heat dissipation as well as a new design of our highly successful mounting cradle that allows the unit to be fully wired before being ‘clicked' into place.  This provides for a faster installation time with mechanics capable of withstanding long term vibration with no risk of screws falling out.


12V-24V ‘UP' Converters for a wide range of applications

If you need to fit 24V equipment onto a 12V electrical system, then an ‘up' converter from the DD Series offers a fast and easy way to configure your system.  Now with a range from 72W (3A output) to 600W (25A output), these products offer state of the art designs for fast installation and long term reliable operation. 

A Wide Range of Applications

Typical applications include the installation of 24V equipment on 12V vehicles and installation of specialist equipment requiring higher operating voltages. 

Also available in IP65 format

The DD Series 12-24V products are available in either standard IP53 format (like most Alfatronix converters) or the Ruggedised IP65 versions.  Just add -RU to the part number.  These are suitable where the installation is in a particularly hostile environment and subject to increased water and dirt exposure.

Choose your DD Series 12-24V ‘UP' Product

Part Number


Nominal Voltage



DD12-24 072

72W (3A) Non-Isolated

12Vdc in, 24Vdc out

89 x 87 x 50mm


DD12-24 168

168W (7A) Non-Isolated

12Vdc in, 24Vdc out

167 x 87 x 50mm


DD12-24 240

240W (10A) Non-Isolated

12Vdc in, 24Vdc out

217 x 87 x 50mm


DD12-24 400

400W (16A) Non-Isolated

12Vdc in, 24Vdc out

233 x 125 x 74mm


DD12-24 600

600W (25A) Non-Isolated

12Vdc in, 24Vdc out

283 x 125 x 74mm


Other output voltage configurations are available as special orders, please ask our sales team

Technical Data

Input voltage range

12 Vdc nominal (10.0V-15.0V)

Output voltage

27.2Vdc +/-5% at extremes of temperature, load, input tolerance, etc.

Continuous current rating

3A - 25A depending on model.

Intermittent rating

Continuous rating +20%, taken for a maximum of 2 minutes followed by 8 minutes rest

Transient voltage protection

Meets ISO7637-2 International standard for 24Vdc commercial vehicles

Electrostatic voltage protection

Meets ISO10605, ISO14892, >8kV contact, 15kV discharge

Output noise

<100mV pk-pk at continuous load. 

Off load current (quiescent current)

<20mA (400W and 600W versions enable off), less than 100mA (72-240W units)

Power conversion efficiency

Typically:  93%

Operating temperature

-25ºC to +30ºC to meet this specification table

+30ºC to +80ºC de rate linearly to 0A

Storage temperature

-25ºC to +70ºC

Operating humidity

95% max., non-condensing


Anodised aluminium, glass filled polycarbonate, dust water and impact resistance to IP533.

Ruggedised versions also available to IP65


Four 6.3mm push on flat blade connectors (72-240W)

Five terminal connector with screw tightening with mating half supplied (400 and 600W units)

Output indicator

Green LED adjacent to output terminals

Mounting method

‘Click ‘n' fit mounting clip, fitted separately using 3 hole fixing (4 hole on 400 and 600W)

Safe area protection: 

Over current             

Limited by current sensing circuit

Over heat

Limited by temperature sensing circuit


Protected by filters and rugged component selection

Input/Output over voltage protection

Controlled by internal circuitry

Catastrophic failure

Protected by internal input and output fuses


2004/108/EC The general EMC directive

2006/96/EC The automotive directive

93/68/EEC The CE marking directive


CE and e marked