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Mean Well

Mean Well DDR-480B-48 DC-DC Converter - 480W - 16.8~33.6V in 48V out

2:1 or 4:1 wide input range, fanless design, 4KVdc I/O isolation, ultra slim dimensions
SKU:
DDR-480B-48
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
    480 Watt
  • Output Voltage
    48 Volt
  • Rated Current
    10 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-48 to convert a 24V battery bank to 48V for powering PoE network switches?

Yes. The DDR-480B-48 accepts 16.8-33.6V DC and outputs 48V at up to 10A (480W). This is well suited for stepping up a 24V battery bus to 48V for IEEE 802.3af/at PoE switches, which commonly require 48V input. The 4KVdc isolation also protects networking equipment from battery bus transients.

Is the DDR-480B-48 appropriate for powering 48V telecom equipment in a remote site with a 24V solar battery system?

Yes. Remote telecom shelters often run a 24V solar-charged battery bank but need 48V for radio and switching equipment. The DDR-480B-48 bridges that gap with 480W of isolated power. Its -40°C to +80°C operating range handles extreme site temperatures, and the fanless design reduces maintenance in dusty or sandy locations.

Can the DDR-480B-48 supply 48V DC to power multiple small embedded devices in a DIN rail cabinet?

Yes. At 480W and 10A, it can supply many 48V embedded devices simultaneously as long as the aggregate load stays within 480W. The DIN rail mount integrates into standard industrial enclosures, and the 4KVdc I/O isolation keeps the 24V input bus electrically separated from the 48V output bus.

Can the DDR-480B-48 be installed in an unventilated outdoor telecom enclosure?

It is rated for -40°C to +80°C and uses fanless convection cooling, so it does not rely on ventilation fans. In a sealed outdoor enclosure, ensure that solar heating and the unit's own 480W heat dissipation do not push internal temperature above 80°C. Proper enclosure sizing or passive heat sinks can help in hot climates.

What input voltage range options exist for the 480W 48V DDR models?

The DDR series offers 480W at 48V / 10A across three input ranges: the DDR-480B-48 accepts 16.8-33.6V (for 24V bus systems), the DDR-480C-48 accepts 33.6-67.2V (for 48V bus systems), and the DDR-480D-48 accepts 67.2-154V (for higher-voltage DC distribution). Select the suffix letter matching your available DC bus voltage.

Other DDR-480B Models

2 other models
ModelPowerVoltageCurrentIP Rating
Mean Well DDR-480B-24 DC-DC Converter - 480W - 16.8~33.6V in 24V out 480W 24V 20A Indoor View
Mean Well DDR-480B-12 DC-DC Converter - 400.8W - 16.8~33.6V in 12V out 400.8W 12V 33.4A Indoor View
View all 53 DDR Series models
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Mean Well DDR-480B-48 DC-DC Converter - 480W - 16.8~33.6V in 48V out
Mean Well

Mean Well DDR-480B-48 DC-DC Converter - 480W - 16.8~33.6V in 48V 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 - 48V out - 9~18V in
  • 120W - 48V out - 16.8~33.6V in
  • 120W - 48V out - 33.6~67.2V in
  • 120W - 48V out - 67.2~154V in
  • 240W - 48V out - 16.8~33.6V in
  • 240W - 48V out - 33.6~67.2V in
  • 240W - 48V out - 67.2~154V in
  • 480W - 48V out - 16.8~33.6V in
  • 480W - 48V out - 33.6~67.2V in
  • 480W - 48V out - 67.2~154V in
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