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

Name: Mean Well DDR-480B-12 DC-DC Converter - 400.8W - 16.8~33.6V in 12V out
Brand: Mean Well
SKU: DDR-480B-12
Price: 184.66 USD
Availability: InStock

2:1 or 4:1 wide input rangefanless design4KVdc I/O isolationultra slim dimensions

SKU:

DDR-480B-12

$184.66 USD

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Select model — 8 in this family

DDR-480B-12

DDR-120B-12 12V out 120W In stock $63.90 USD

DDR-480B-12 12V out 400W Low stock $184.66 USD

DDR-120B-24 24V out 120W In stock $68.88 USD

DDR-240B-24 24V out 240W In stock $96.10 USD

DDR-480B-24 24V out 480W In stock $184.66 USD

DDR-120B-48 48V out 120W In stock $65.99 USD

DDR-240B-48 48V out 240W In stock $89.01 USD

DDR-480B-48 48V out.480W Low stock $184.66 USD

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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

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
No of Output

1
Dimming Control

None
Standards Met

EMC
Operation Mode

Constant Voltage
Operating Temperature

-40°C~80°C
Warranty

3 Year
Length

5.06 in
Width

4.93 in
Height

3.37 in
Weight

3.03 lb

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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Model	Power	Voltage	Current	IP Rating	Price
Mean Well DDR-480B-48 DC-DC Converter - 480W - 16.8~33.6V in 48V out	480W	48V	10A	Indoor	$184.66	View
Mean Well DDR-480B-24 DC-DC Converter - 480W - 16.8~33.6V in 24V out	480W	24V	20A	Indoor	$184.66	View

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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

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

Select model — 8 in this family

Key Features

Frequently Asked Questions

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

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