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Mean Well

Mean Well DDR-480B-12 DC-DC Converter - 400.8W - 16.8~33.6V in 12V out

2:1 or 4:1 wide input range, fanless design, 4KVdc I/O isolation, ultra slim dimensions
SKU:
DDR-480B-12
Model
Please for Pricing
|

Description

The DDR-480B is a 480W DIN Rail type DC-DC converter designed for rolling stock and railway applications requiring compliance with EN50155 standards. With an input range of 16.8~33.6Vdc (nominal 24Vdc), it converts from standard on-board DC bus supplies to isolated 12V, 24V, or 48V outputs. Built to withstand shock and vibration per IEC61373, it operates reliably from -40~+80°C and supports current sharing for higher-power parallel configurations.

Key Features

  • ✓ 85.5mm wide — DIN rail TS-35 compatible
  • ✓ Input voltage range: 16.8~33.6Vdc (nominal 24Vdc)
  • ✓ DC output voltage adjustable ±10%
  • ✓ 4KVdc reinforced I/O isolation
  • ✓ Wide operating temperature: -40°C ~ +80°C
  • ✓ Protections: Short circuit / Overload / Over voltage / Reverse polarity / Under voltage lockout
  • ✓ DC OK relay contact output
  • ✓ Remote ON/OFF control
  • ✓ Current sharing up to 1920W (parallel 3+1 units)
  • ✓ Safety approvals: UL 62368-1, IEC 62368-1, AS/NZS 62368.1, EAC TP TC 004
  • ✓ Railway standards: EN50155, IEC60571, IEC61373 (shock & vibration)
  • ✓ 3 years warranty

Specifications
  • Brand
    Mean Well
  • Series
    DDR Series
  • Power Rating
    400.8 Watt
  • Output Voltage
    12 Volt
  • Rated Current
    33.4 Ampere
  • Input Voltage
    16.8V~33.6V
  • Standards Met
    EMC
  • Operation Mode
    Constant Voltage
  • Operating Temperature
    -40°C~80°C
  • Warranty
    3 Year
  • Length
    12.85 cm
  • Width
    12.52 cm
  • Height
    8.55 cm
  • Weight
    1.38 kg

File Downloads

::specification::

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Frequently Asked Questions

Can I use the DDR-480B-12 to power a large 12V motor drive or resistive heating element from a 24V battery system?

Yes. The DDR-480B-12 delivers 12V at up to 33.4A (400.8W), which is substantial enough for medium motor drives, resistive heaters, or high-current actuators. Its 16.8-33.6V DC input range covers a nominal 24V battery bank (typical 21-29V range) comfortably.

Is the DDR-480B-12 suitable for powering 12V server or networking equipment in a 24V DC data center distribution setup?

Yes. With 400.8W at 12V and 33.4A, it can supply one or more 12V rack devices. The 16.8-33.6V input accepts a 24V DC bus, and the 4KVdc I/O isolation prevents ground loops between the distribution bus and downstream equipment. Its DIN rail mount simplifies installation in power distribution panels.

Can the DDR-480B-12 convert 24V solar or wind DC to 12V for a large off-grid lighting installation?

Yes, provided the input voltage stays within 16.8-33.6V DC. A 24V solar array with battery buffering typically stays in this range. At 400.8W, it can drive substantial 12V LED lighting loads across a facility or campsite. The -40°C to +80°C operating range supports year-round outdoor enclosure deployment.

Can the DDR-480B-12 operate in a cold-start outdoor environment without preheating?

Yes. The DDR-480B-12 is rated for -40°C to +80°C operating temperature, so it starts and runs in extreme cold without a separate heater. Its fanless design avoids mechanical failure from ice or condensation. Mount it inside a weatherproof NEMA or IP-rated enclosure to protect it from direct moisture exposure.

What are the differences between the DDR-480B, DDR-480C, and DDR-480D models at 12V output?

All three provide 400.8W at 12V / 33.4A output but accept different input voltage ranges: the DDR-480B-12 takes 16.8-33.6V DC (for 24V bus systems), the DDR-480C-12 takes 33.6-67.2V DC (for 48V bus systems), and the DDR-480D-12 takes 67.2-154V DC (for higher-voltage DC distribution). Choose the letter suffix that matches your upstream bus voltage.

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Mean Well DDR-480B-12 DC-DC Converter - 400.8W - 16.8~33.6V in 12V out
Mean Well

Mean Well DDR-480B-12 DC-DC Converter - 400.8W - 16.8~33.6V in 12V out

Please for Pricing

The DDR-480B is a 480W DIN Rail type DC-DC converter designed for rolling stock and railway applications requiring compliance with EN50155 standards. With an input range of 16.8~33.6Vdc (nominal 24Vdc), it converts from standard on-board DC bus supplies to isolated 12V, 24V, or 48V outputs. Built to withstand shock and vibration per IEC61373, it operates reliably from -40~+80°C and supports current sharing for higher-power parallel configurations.

Key Features

Model

  • 100W - 12V out - 9~18V in
  • 120W - 12V out - 16.8~33.6V in
  • 120W - 12V out - 33.6~67.2V in
  • 120W - 12V out - 67.2~154V in
  • 15W - 12V out - 9~36V in
  • 15W - 12V out - 18~75V in
  • 30W - 12V out - 9~36V in
  • 30W - 12V out - 18~75V in
  • 400.8W - 12V out - 16.8~33.6V in
  • 400.8W - 12V out - 33.6~67.2V in
  • 400.8W - 12V out - 67.2~154V in
  • 60W - 12V out - 9~36V in
  • 60W - 12V out - 18~75V in
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