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Mean Well

Mean Well DDR-240B-48 DC-DC Converter - 240W - 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-240B-48
Model
Please for Pricing
|

Description

The DDR-240B is a 240W 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~+70°C and supports current sharing for higher-power parallel configurations.

Key Features

  • ✓ 40mm 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 ~ +70°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 960W (parallel 3+1 units)
  • ✓ Safety approvals: IEC 62368-1, UL 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
    240 Watt
  • Output Voltage
    48 Volt
  • Rated Current
    5 Ampere
  • Input Voltage
    16.8V~33.6V
  • Standards Met
    CE,EMC,UL
  • Operation Mode
    Constant Voltage
  • Operating Temperature
    -40°C~85°C
  • Warranty
    2 Year
  • Length
    12.52 cm
  • Width
    11.35 cm
  • Height
    4 cm
  • Weight
    0.76 kg

File Downloads

::specification::

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Frequently Asked Questions

Can I use the DDR-240B-48 to generate a 48V supply for PoE switches from a 24V battery bank?

Yes. The DDR-240B-48 accepts 16.8-33.6V DC input and outputs 48V at up to 5A (240W). It can step up a 24V battery bus to 48V for powering PoE switches, PoE injectors, or 48V networking equipment in remote or off-grid installations.

Is the DDR-240B-48 suitable for powering 48V telecom equipment from a 24V DC source?

Yes. The DDR-240B-48 converts a 16.8-33.6V DC input to a regulated 48V at 5A. This makes it well suited for stepping up a 24V bus to the 48V nominal level required by telecom rectifier systems, base station equipment, or DC power distribution units.

Can the DDR-240B-48 power 48V motor controllers or servo drives in an automation panel?

The DDR-240B-48 provides 240W at 48V/5A, which can power small 48V brushless DC motor controllers, servo drives, or stepper motor drivers. For motor loads with high inrush currents, verify that peak demand does not exceed the converter's output capability.

Can the DDR-240B-48 operate in an unventilated outdoor enclosure in desert or tropical climates?

The DDR-240B-48 is rated for -40°C to +85°C and uses fanless convection cooling. In sealed outdoor enclosures exposed to direct sun in hot climates, internal temperatures can exceed ambient significantly. Ensure adequate enclosure sizing or thermal management to keep internal temperature within the rated range, especially at full 240W load.

What input voltage range options are available for DDR-240 models with 48V output?

The DDR series offers three 240W/48V models with different input ranges: DDR-240B-48 (16.8-33.6V input), DDR-240C-48 (33.6-67.2V input), and DDR-240D-48 (67.2-154V input). Each delivers 48V at 5A. Select the variant that matches your DC source voltage.

Can the DDR-240B-48 be used in a renewable energy system to step up 24V solar battery output to 48V for an inverter input stage?

Yes. The DDR-240B-48 can convert a 24V solar battery bank (within 16.8-33.6V) to 48V at up to 5A for feeding inverter input stages, charge controllers, or 48V DC distribution buses. The 4KVdc I/O isolation provides galvanic separation between the battery bank and the 48V bus.

Other DDR-240B Models

1 other model
ModelPowerVoltageCurrentIP Rating
Mean Well DDR-240B-24 DC-DC Converter - 240W - 16.8~33.6V in 24V out 240W 24V 10A Indoor View
View all 53 DDR Series models
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Mean Well DDR-240B-48 DC-DC Converter - 240W - 16.8~33.6V in 48V out
Mean Well

Mean Well DDR-240B-48 DC-DC Converter - 240W - 16.8~33.6V in 48V out

Please for Pricing

The DDR-240B is a 240W 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~+70°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
View product

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