Mean Well DDR-480C-48 DC-DC Converter - 480W - 33.6~67.2V in 48V out

Overview

DDR-480C-48 is the 48V output model of this series: rated current 10A, rated power 480W, typical efficiency 92%.

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-48Specifications from the official datasheet (2026-09-10 edition)

OUTPUT

DC VOLTAGE: 48V
RATED CURRENT: 10A
CURRENT RANGE: 0 ~ 10A
RATED POWER: 480W
PEAK CURRENT 5sec.^Note.5: 15A
PEAK POWER 5sec.^Note.5: 12Vo: 601.2W, 24Vo / 48Vo : 720W
RIPPLE & NOISE (max.)^Note.2: 150mVp-p
VOLTAGE ADJ. RANGE: 48~ 56V
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.): 92%
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: 57.6 ~ 65V 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-48 Block Diagram — Block Diagram

DDR-480C-48 Derating Curve — Derating Curve

DDR-480C-48 Function Manual — Function Manual

DDR-480C-48 Input Under-Voltage Protection — Input Under-Voltage Protection

DDR-480C-48 Inrush Current — Inrush Current

DDR-480C-48 Efficiency vs Load & Vin Curve — Efficiency vs Load & Vin Curve

DDR-480C-48 D D R - 4 8 0 series — D D R - 4 8 0 series

DDR-480C-48 Mechanical Specification — Mechanical Specification

DDR-480C-48 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-48 Test Report PDF Download

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the DDR-480C-48 to convert a 48V battery bank to a regulated 48V rail for PoE switches?

The DDR-480C-48 accepts 33.6-67.2V DC input and outputs a regulated 48V at up to 10A (480W). If your battery bank voltage stays within the input range, it can provide a stable 48V supply suitable for PoE switches and networking equipment. The 4KVdc I/O isolation adds protection against ground loops.

Is the DDR-480C-48 a good fit for powering 48V telecom equipment from a 48V or 60V DC bus?

Yes. The DDR-480C-48 accepts input from 33.6V to 67.2V, which covers nominal 48V and 60V DC distribution buses commonly found in telecom environments. It delivers a regulated 48V output at 10A, suitable for telecom base stations, routers, and similar 48V infrastructure loads.

Can the DDR-480C-48 be used to power industrial fieldbus or Ethernet networking equipment?

The DDR-480C-48 provides 480W at 48V/10A with DIN rail mounting and 92% typical efficiency, making it well suited for powering managed Ethernet switches, media converters, and fieldbus gateways in industrial control cabinets. The wide 33.6-67.2V input range accommodates varying DC bus voltages found in industrial plants.

Can I install the DDR-480C-48 in a machine room with ambient temperatures above 70 degrees Celsius?

The DDR-480C-48 is rated for operation from -40 to +80 degrees Celsius. It will function in environments up to 80 degrees C, but at high ambient temperatures the output must be derated according to the derating curve, so size the load accordingly. Ensure adequate airflow around the unit.

Does the DDR-480C-48 provide galvanic isolation between input and output?

Yes. The DDR-480C-48 features 4KVdc input-to-output isolation. This is important in systems where the input DC bus and the 48V output load reference different ground potentials, such as in telecom or renewable energy installations where ground faults must be contained.

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Model	Power	Voltage	Current	IP Rating
Mean Well DDR-480C-24 DC-DC Converter - 480W - 33.6~67.2V in 24V out 20A	480W	24V	20A	IP20	View
Mean Well DDR-480C-12 DC-DC Converter - 400.8W - 33.6~67.2V in 12V out 33.4A	400.8W	12V	33.4A	IP20	View

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Mean Well DDR-480C-48 DC-DC Converter - 480W - 33.6~67.2V in 48V out 10A

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