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Mean Well DDR-480B-48 DC-DC Converter - 480W - 16.8~33.6V in 48V out 10A

Name: Mean Well DDR-480B-48 DC-DC Converter - 480W - 16.8~33.6V in 48V out 10A
Brand: Mean Well
SKU: DDR-480B-48
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-480B-48 is the 48V output model of this series: rated current 10A, rated power 480W, typical efficiency 90.5%.

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-480B-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: 16.8 ~ 33.6Vdc
VOLTAGE RANGE 100ms^Note.4: 14.4 ~ 16.8Vdc
EFFICIENCY (Typ.): 90.5%
DC CURRENT (Typ.): 23A @24Vdc
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: 24Vin (B - type) :Power ON≥16.8V , OFF≤16.5V

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-480B-48 Block Diagram — Block Diagram

DDR-480B-48 Derating Curve — Derating Curve

DDR-480B-48 Function Manual — Function Manual

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

DDR-480B-48 Inrush Current — Inrush Current

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

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

DDR-480B-48 Mechanical Specification — Mechanical Specification

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

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the DDR-480B-48 to convert a 24V battery bank to 48V for powering PoE network switches?

Yes. The DDR-480B-48 accepts 16.8-33.6V DC and outputs 48V at up to 10A (480W), adjustable from 48 to 56V. This is well suited for stepping up a 24V battery bus to feed PoE switches that take a 48V-class DC input. The 4KVdc input-to-output isolation also keeps networking equipment separated from the battery bus.

Is the DDR-480B-48 appropriate for powering 48V telecom equipment in a remote site with a 24V solar battery system?

Yes. Remote telecom shelters often run a 24V solar-charged battery bank but need 48V for radio and switching equipment. The DDR-480B-48 bridges that gap with 480W of isolated power. Its -40°C to +80°C operating range (with load derating at high ambient temperatures) handles extreme site temperatures when installed in a protective enclosure.

Can the DDR-480B-48 supply 48V DC to power multiple small embedded devices in a DIN rail cabinet?

Yes. At 480W and 10A, it can supply many 48V embedded devices simultaneously as long as the aggregate load stays within 480W. The DIN rail mount integrates into standard industrial enclosures, and the 4KVdc I/O isolation keeps the 24V input bus electrically separated from the 48V output bus.

Can the DDR-480B-48 be installed in an unventilated outdoor telecom enclosure?

It is rated for -40°C to +80°C, with the allowable load reduced at higher ambient temperatures according to the derating curve. In a sealed outdoor enclosure, ensure that solar heating and the unit's own losses (about 90.5% typical efficiency, so roughly 50W at full load) keep the internal temperature within the derating curve for your load. Proper enclosure sizing can help in hot climates.

What input voltage range options exist for the 480W 48V DDR models?

The DDR series offers 480W at 48V / 10A across three input ranges: the DDR-480B-48 accepts 16.8-33.6V (for 24V bus systems), the DDR-480C-48 accepts 33.6-67.2V (for 48V bus systems), and the DDR-480D-48 accepts 67.2-154V (for higher-voltage DC distribution). Select the suffix letter matching your available DC bus voltage.

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