• SlidePV-001
  • SlidePV-002
  • SlidePV-001
  • SlidePV-001
  • SlidePV-001
  • SlidePV-006
  • SlidePV-007
  • SlidePV-008
  • SlidePV-009
  • SlidePV-010
  • SlidePV-011
  • SlidePV-012
  • SlidePV-014
  • SlidePV-015
  • SlidePV-016
  • SlidePV-017



  • Installations of mobile and cellular radio communications equipment
  • Telemetry systems
  • Refridgeration
  • Televisions etc on trucks, buses, forestry and off road vehicles as well as boats and yachts and a variety of industrial applications



These products offer a convenient way to operate mass produced 12Vdc equipment such as cell phones, in car entertainment, professional communication and telematics equipment, refrigerators, televisions etc. from the 24Vdc mobile electrical systems found on diesel engined vehicles and vessels.

PowerVerter 24Vdc to 12Vdc Voltage Converters

A Comprehensive Range

There are 10 products in the range from 3A to 24A in isolated or common earth configurations. They have been optimised for high volume 24Vdc to 12Vdc applications such as on heavy goods vehicles, coaches, buses, construction, forestry and agricultural vehicles, commercial and leisure marine vessels.

Tamper Proof

There are no ventilation holes to permit stray objects, dust or water droplets to enter the case. There are no external fuses to be tampered with. Fuses will only blow if there is a fault so there is no need to make them accessible.

All PowerVerters are enclosed in a rugged aluminium extrusion. The low mass Surface Mount Technology components are also less prone to damage from vibration and shock, further increasing the reliability of the units.

3Amp units are excellent for charging mobile phones, while 6A units suit a variety of mobile radio applications.

Galvanically isolated units are suitable for marine applications and come complete with the green tamperproof label for petrochemical applications.

Fast Installation

All the units consume an off load current of less than 15mA, which is probably less than the self discharge current of the vehicle’s battery. In most cases this can be ignored, speeding the installation by removing the need to fit a remote switch. All products fit onto a ‘Click ‘n’ Fit mounting clip which is fixed in three points allowing it to be mounted on uneven surfaces. It is easy to fit the clip into awkward places and then simply click the unit into position. A green LED indicates when there is output from the converter. This gives reassurance to the installation enginer and speeds fault finding.

Easy 6 step Installation Method

1. Find a convenient location away from sun and rain.
2. Using the mounting clip as a template, mark fixing positions.
3. Drill screw holes.
4. Fix bracket using screws provided.
5. Clip PowerVerter to mounting bracket.
6. Correctly connect to load.

Typical applications

Installations of mobile and cellular radio communications equipment, telemetry systems, refrigeration, televisions etc on trucks, buses, forestry and off road vehicles as well as boats and yachts and a variety of industrial applications. For a wider range of input and output voltages, see the DD Series.

All PowerVerters convert
24Vdc to 12Vdc
Common Negative
Input to Output
Load Current

Continuous / Intermittent
3 / 6 A PV3s PV3i
6 / 10 A PV6s PV6i
12 / 18 A PV12s PV12i
18 / 21 A PV18s PV18i
24 / 30 A PV24s PV24i
50 / 60 A DD24-12 600  

Input voltage range


Output voltage

13.6Vdc +15% -20% at extremes of temperature, load, input tolerance, etc.

Intermittent output power

As stated, 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

<50mV pk-pk (100mV on 24V units) at continuous load. Meets CISPR25 and VDE0879-3

Off load current (quiescent current)


Power conversion efficiency

Typically: 90% for non-isolated units, 85% for isolated units


>400Vrms between input, output and case, on isolated products only

Mean time between failures

>162 years (HRD4)

Operating temperature

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

+30ºC to +80ºC de rate linearly to 0A

Storage temperature

-25ºC to +100ºC

Operating humidity

95% max., non-condensing


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


Four 6.3mm push-on flat blade connectors

Output indicator

Green LED adjacent to output terminals

Mounting method

‘Click ‘n’ fit mounting clip, fitted separately using three hole fixing

Safe area protection: Over current

Limited by current sensing circuit

Over heat

Limited by temperature sensing circuit


Protected by filters and rugged component selection

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

Alfatronix Part Number

NSN Nato Part Number





















DD24-12 600


Alfatronix (Ireland)


Phone: +353 (0)404 62399

C26 Wicklow Enterprise Centre
The Murrough
Wicklow Town
Co. Wicklow