At a glance
- Output Voltage
- 12 V
- Rated Output Current
- 33.4 A
- Rated Output Power
- 400.8 W
- Input Voltage Range
- 16.8 to 33.6 V DC (continuous)
- Mounting
- DIN Rail
MEAN WELL DDR-480B-12 DIN Rail DC-DC Converter, 12 V, 33.4 A, 400.8 W
Price on request
At a glance
- Output Voltage
- 12 V
- Rated Output Current
- 33.4 A
- Rated Output Power
- 400.8 W
- Input Voltage Range
- 16.8 to 33.6 V DC (continuous)
- Mounting
- DIN Rail
Clips onto a DIN rail and turns one DC supply into another regulated voltage, so panel devices can run from an existing DC rail or battery. 400.8 W DIN rail DC-DC converter with a 12 V DC output rated at 33.4 A.
Part of the MEAN WELL DDR-480 series. Compare all 9 models
Include the required quantity and configuration in your quote request. Price and availability will be confirmed in the quotation.
- WarrantyManufacturer warranty under MEAN WELL's terms: 3 years. Warranty claims
- DeliveryPrice, availability and delivery charges are confirmed in your quotation. Shipping and delivery
Overview
What it is
The MEAN WELL DDR-480B-12 is a 400.8 W DIN rail DC-DC converter from the DDR-480 series (480 W DIN Rail Type DC-DC Converter). It provides a 12 V DC output with up to 33.4 A of rated current.
What it is used for
DIN rail DC-DC converters convert one DC rail to another inside control panels.
Key Specifications
- Output: 12 V, 33.4 A rated current, 400.8 W rated power.
- Output voltage adjustable over 12 to 14 V.
Buying considerations
Choose a rated current with headroom above the total load of the connected devices, and check the derating curve in the datasheet if the supply will run hot or at low input voltage. Other output voltages and power ratings in the same series are listed on this page.
Installation considerations
MEAN WELL treats this unit as a component to be installed inside final equipment, so approvals and EMC performance should be confirmed for the complete installation. Wiring, safety and EMC details are in the official datasheet linked below.
Features



Size and fit
- Mounting
- DIN Rail
Technical specifications
Key facts
- What is it?
- DC/DC ConvertersBrand MEAN WELL, model DDR-480B-12
- What does it output?
- 12 V, 33.4 A, 400.8 W
- What input does it accept?
- 16.8 to 33.6 V DC (continuous)
- How does it mount?
- DIN Rail
- Which documents are available?
- Datasheet, certificate Open documents
RelatedSeriesMEAN WELL DDR-480 series, 9 modelsDocumentsAll MEAN WELL documents
- Output Voltage
- 12 V
- Rated Output Current
- 33.4 A
- Output Current Range
- 0 to 33.4 A
- Rated Output Power
- 400.8 W
- Output Voltage Adjustment Range
- 12 to 14 V
- Output Voltage Tolerance
- ±1.0%
- Ripple and Noise (max.)
- 100 mVp-p
- Line Regulation
- ±0.5%
- Load Regulation
- ±1.0%
- Mounting
- DIN Rail
- Series
- DDR-480
- Input Voltage Range
- 16.8 to 33.6 V DC (continuous); 14.4 to 16.8 V DC (100 ms)
- Warranty
- Manufacturer warranty under MEAN WELL's terms: 3 years. How claims work
Product attributes and shipping details
| Brand | MEAN WELL |
|---|---|
| Power Output | 400.8 W |
Downloads
Documentation
- DDR-480 series datasheetDatasheet · Family · meanwell.comDownload
Certificate and compliance document (1)
- DDR-480 CE declaration of conformityCertificate · Family · meanwell.comDownload
Series documents can differ from your exact model. Report a wrong or missing file
Questions about this product
Can the output voltage of the DDR-480B-12 be adjusted?
Yes. The datasheet gives an adjustment range of 12 to 14 V.
Ask about this modelSetup, compatibility, what is in the box
Answers are automated. Do not enter personal or account details.
Looking for an alternative?
We list alternatives only when we have checked they suit the same job. Compare other models in the category, or ask us to suggest one for your site.




