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Mean Well DDR-480C-12 DC-DC Converter - 400.8W - 33.6~67.2V in 12V out 33.4A

Name: Mean Well DDR-480C-12 DC-DC Converter - 400.8W - 33.6~67.2V in 12V out 33.4A
Brand: Mean Well
SKU: DDR-480C-12
Price: 198.56 USD
Availability: InStock

$198.56 USD

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Model

12V out 120W 12V out 400W 24V out 120W 24V out 240W 24V out 480W 48V out 120W 48V out 240W 48V out 480W

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Overview

DDR-480C-12 is the 12V output model of this series: rated current 33.4A, rated power 400.8W, typical efficiency 91%.

DDR-480 series is a 480W DIN Rail type DC-DC converter with main features including DIN rail-type easy installation, ultra slim width (85.5mm), 2:1 wide input voltage, fanless design, -40~+80℃ wide operating temperature, 4KVdc I/O isolation, 150% peak load, current sharing, DC OK, adjustable output voltage and full protective functions. This series of models has various input options: 16.8~33.6V / 33.6~67.2V / 67.2~154V and multiple output options: 12V / 24V / 48V and can be used for industrial & railway control, security control, communication system and other fields. Suitable applications include to DC buck/boost regulator, increasing system insulation level and voltage drop compensation along cable...etc.

Features

Compliance to BS EN/EN50155 and BS EN/EN45545-2 railway standard
Width only 85.5mm
2:1 wide input range
-40~+80℃ wide operating temperature
150% peak load capability
Current sharing up to 1920W(3+1)
DC output adjustable
Cooling by free air convection
Can be installed on DIN rail TS-35/7.5 or 15
Protections: Short circuit / Overload / Over voltage / Over temperature / Input reverse polarity/ Input under voltage protection
4KVdc I/O isolation(Reinforced isolation)
DC OK relay contact
Remote ON-OFF control
Operating attitude up to 5000 meters(Note.6)
Conformal coating
3 years warranty

Specifications

DDR-480C-12Specifications from the official datasheet (2026-09-10 edition)

OUTPUT

DC VOLTAGE: 12V
RATED CURRENT: 33.4A
CURRENT RANGE: 0 ~ 33.4A
RATED POWER: 400.8W
PEAK CURRENT 5sec.^Note.5: 50.1A
PEAK POWER 5sec.^Note.5: 12Vo: 601.2W, 24Vo / 48Vo : 720W
RIPPLE & NOISE (max.)^Note.2: 100mVp-p
VOLTAGE ADJ. RANGE: 12 ~ 14V
VOLTAGE TOLERANCE^Note.3: ±1.0%
LINE REGULATION: ±0.5%
LOAD REGULATION: ±1.0%
SETUP, RISE TIME: 500ms, 60ms
HOLD UP TIME (Typ.): Please refer to page 6 hold up time (Load de-rating curve )

INPUT

VOLTAGE RANGE CONTINUOUS^Note.4: 33.6 ~ 67.2Vdc
VOLTAGE RANGE 100ms^Note.4: 28.8 ~ 33.6Vdc
EFFICIENCY (Typ.): 91%
DC CURRENT (Typ.): 11.2A @48Vdc
INRUSH CURRENT (Typ.): 30A
INTERRUPTION OF VOLTAGE SUPPLY: EN50155: 2021-B/C/D type comply with S2 level (10ms)@ full load

PROTECTION

OVERLOAD^Note.5: Normally works within 150% rated output power for more than 5 seconds and then constant current protection 105~135% rated output power with auto-recovery
OVER VOLTAGE: 14.4 ~ 17.5V Protection type : Shut down o/p voltage, re-power on to recover
OVER TEMPERATURE: Shut down o/p voltage, re-power on to recover
REVERSE POLARITY: By internal, MOSFET, no damage, recovers automatically after fault condition is removed
UNDER VOLTAGE LOCKOUT: 48Vin (C - type) :Power ON≥33.6V , OFF≤33V

FUNCTION

DC OK REALY CONTACT RATINGS (max.): 30Vdc/1A resistive load
CURRENT SHARING: Up to 1920W (3+1 units). Please refer to the Function Manual
REMOTE ON-OFF CONTROL: Please refer to the Function Manual

ENVIRONMENT

WORKING TEMP.: -40 ~ +80℃ (Refer to "Derating Curve")
WORKING HUMIDITY: 5 ~ 95% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +85, 5 ~ 95% RH non-condensing
TEMP. COEFFICIENT: ±0.03%/℃ (0 ~ 55℃)
VIBRATION: Component:10 ~ 500Hz, 5G 10min./1cycle, 60min. each along X, Y, Z axes; Mounting: Compliance to IEC61373
OPERATING ALTITUDE^Note.6: 5000 meters / OVCⅡ

SAFETY & EMC

SAFETY STANDARDS: UL 62368-1, IEC 62368-1, AS/NZS 62368-1, EAC TP TC 004 approved
WITHSTAND VOLTAGE: I/P-O/P:4KVdc I/P-FG:2.5KVdc O/P-FG:0.71KVdc
ISOLATION RESISTANCE: I/P-O/P, I/P-FG, O/P-FG:>100M Ohms / 500Vdc / 25℃/ 70% RH
EMC EMISSION: Parameter Standard Test Level

Conducted BS EN/EN55032 (CISRP32) Class A
Radiated BS EN/EN55032 (CISRP32) Class B
Voltage Flicker BS EN/EN61000-3-3
EMC IMMUNITY: BS EN/EN55035

Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 3, 8KV air; Level 3, 6KV contact; criteria A
Radiated BS EN/EN61000-4-3 Level 3, 10V/m; criteria A
EFT / Burst BS EN/EN61000-4-4 Level 3, 2KV; criteria A
Surge BS EN/EN61000-4-5 Level 3, 1KV/Line-Line ;Level 3, 2KV/Line-Line-FG ;criteria A
Conducted BS EN/EN61000-4-6 Level 3, 10V; criteria A
Magnetic Field BS EN/EN61000-4-8 Level 4, 30A/m; criteria A
RAILWAY STANDARD: Compliance to BS EN/EN45545-2 for fire protection ; Meet BS EN/EN50155 / IEC60571 including IEC61373 for shock & vibration, BS EN/EN50121-3-2 for EMC

Parameter	Standard	Test Level
Conducted	BS EN/EN55032 (CISRP32)	Class A
Radiated	BS EN/EN55032 (CISRP32)	Class B
Voltage Flicker	BS EN/EN61000-3-3

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 3, 8KV air; Level 3, 6KV contact; criteria A
Radiated	BS EN/EN61000-4-3	Level 3, 10V/m; criteria A
EFT / Burst	BS EN/EN61000-4-4	Level 3, 2KV; criteria A
Surge	BS EN/EN61000-4-5	Level 3, 1KV/Line-Line ;Level 3, 2KV/Line-Line-FG ;criteria A
Conducted	BS EN/EN61000-4-6	Level 3, 10V; criteria A
Magnetic Field	BS EN/EN61000-4-8	Level 4, 30A/m; criteria A

OTHERS

MTBF: 750.3K hrs min. Telcordia SR-332 (Bellcore) ; 101.7K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 85.5*125.2*129.2mm (W*H*D)
PACKING: 1.375Kg;8pcs/12Kg/0.95CUFT

Test conditions and notes7

1. All parameters NOT specially mentioned are measured at normal input (B:24Vdc , C:48Vdc , D:110Vdc ) , rated load and 25℃ of ambient temperature.
2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1μF & 47μF parallel capacitor.
3. Tolerance : includes set up tolerance, line regulation and load regulation.
4. Derating may be needed under low input voltage. Please check the derating curve for more details.
5. 150% 5 seconds, please refer to peak loading curves.
6. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than2000m(6500ft).
7. The power supply is considered as an independent unit, but the final equipment still need to re-confirm that the whole system complies with the EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.” (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )

Technical drawings

DDR-480C-12 Block Diagram — Block Diagram

DDR-480C-12 Derating Curve — Derating Curve

DDR-480C-12 Function Manual — Function Manual

DDR-480C-12 Input Under-Voltage Protection — Input Under-Voltage Protection

DDR-480C-12 Inrush Current — Inrush Current

DDR-480C-12 Efficiency vs Load & Vin Curve — Efficiency vs Load & Vin Curve

DDR-480C-12 D D R - 4 8 0 series — D D R - 4 8 0 series

DDR-480C-12 Mechanical Specification — Mechanical Specification

DDR-480C-12 Installation Instruction — Installation Instruction

Typical applications

Downloads

Certificates7

UL Certificate(DDR-480)(EN) PDF Download

Mean Well E183223 UL Certificate PDF Download

DDR-480-EN50155 Certificate PDF Download

Mean Well DDR-480-CB(UL) Certificate PDF Download

Mean Well DDR-480-CE-dec Certificate PDF Download

Mean Well DDR-480-UK-dec Certificate PDF Download

Mean Well EAC Certificate PDF Download

Test reports1

Mean Well DDR-480C-12 Test Report PDF Download

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the DDR-480C-12 to step down a 48V data center bus to 12V for high-current server components?

Yes. The DDR-480C-12 accepts 33.6-67.2V DC input, perfectly matching a standard 48V data center bus (typical 42-58V). It delivers 12V at up to 33.4A (400.8W), providing enough current for storage arrays, fan trays, or other 12V rack subsystems that draw significant power.

Is the DDR-480C-12 suitable for converting a 48V telecom DC plant to 12V for legacy radio or modem equipment?

Yes. Telecom central offices and remote sites commonly distribute 48V DC. The DDR-480C-12 converts that to an isolated 12V rail at up to 33.4A, which can power legacy 12V radio transceivers, modems, or alarm panels. The 4KVdc I/O isolation protects sensitive equipment from the main plant bus.

Can the DDR-480C-12 supply 12V power for electric vehicle charging station control electronics from a 48V DC bus?

Yes. EV charging stations often have a 48V DC internal bus for power distribution. The DDR-480C-12 converts that to 12V at up to 33.4A for control boards, displays, communication modules, and contactors. Its DIN rail mount and -40°C to +80°C rating suit outdoor charging station enclosures.

Is the DDR-480C-12 safe for use in environments with wide daily temperature swings?

Yes. It is rated for -40°C to +80°C, covering desert daytime heat as well as sub-zero overnight temperatures; at high ambient temperatures the load must be derated per the derating curve. Humidity is rated 5-95% RH non-condensing, so mount it inside a sealed enclosure that prevents condensation and direct moisture contact.

How does the DDR-480C-12 compare to the DDR-480B-12 and DDR-480D-12?

All three output 12V at 33.4A (400.8W) with the same physical dimensions (85.5 x 125.2 x 129.2 mm). They differ mainly in input voltage range: DDR-480B-12 accepts 16.8-33.6V (24V bus), DDR-480C-12 accepts 33.6-67.2V (48V bus), and DDR-480D-12 accepts 67.2-154V (high-voltage DC bus). Typical efficiency is 90%, 91% and 91% respectively. Choose based on your source DC voltage.

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