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Mean Well DDR-240B-48 DC-DC Converter - 240W - 16.8~33.6V in 48V out 5A

Name: Mean Well DDR-240B-48 DC-DC Converter - 240W - 16.8~33.6V in 48V out 5A
Brand: Mean Well
SKU: DDR-240B-48
Price: 104.76 USD
Availability: InStock

$104.76 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-240B-48 is the 48V output model of this series: rated current 5A, rated power 240W, typical efficiency 90%.

DDR-240 series is a 240W DIN Rail type DC-DC converter with main features including DIN rail-type easy installation, ultra slim width (40mm), 2:1 wide input voltage, fanless design, -40~+70℃ 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 two output options: 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 onlly 40mm
2:1 wide input range
-40~+70℃ wide working temperature
150% peak load capability
Current sharing up to 960W(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
Conformal coating
3 years warranty

Specifications

DDR-240B-48Specifications from the official datasheet (2026-09-10 edition)

OUTPUT

DC VOLTAGE: 48V
RATED CURRENT: 5A
CURRENT RANGE: 0 ~ 5A
RATED POWER: 240W
PEAK CURRENT: 7.5A
PEAK POWER^Note.5: 360W (3sec.)
RIPPLE & NOISE (max.)^Note.2: 100mVp-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%
DC CURRENT (Typ.): 11.2A @24Vdc
INRUSH CURRENT (Typ.): 30A
INTERRUPTION OF VOLTAGE SUPPLY: EN50155:2021-Comply with S1 level

PROTECTION

OVERLOAD^Note.5: Normally works within 150% rated output power for more than 3 seconds and then constant current protection 105~135% rated output power with auto-recovery
OVER VOLTAGE: 57.6 ~ 65.0V Protection type : Shut down o/p voltage, re-power on to recover
OVER TEMPERATURE: Shut down o/p voltage, re-power on to recover
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 960W (3+1 units). Please refer to the Function Manual
REMOTE ON-OFF CONTROL: Please refer to the Function Manual

ENVIRONMENT

WORKING TEMP.: -40 ~ +70℃ (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.7: 5000 meters

SAFETY & EMC

SAFETY STANDARDS: IEC 62368-1, UL 62368-1, EAC TP TC 004, AS/NZS 62368.1 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 Class B
Radiated BS EN/EN55032 Class B
Voltage Flicker BS EN/EN61000-3-3
EMC IMMUNITY: BS EN/EN55035 , BS EN/EN61000-6-2(BS EN/EN50082-2)

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	Class B
Radiated	BS EN/EN55032	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: 1415.6K hrs min. Telcordia SR-332 (Bellcore) ; 189.9K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 40*125.2*113.5mm (W*H*D)
PACKING: 0.76Kg;20psc/16.2Kg/1.0CUFT

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. 3 seconds max., please refer to peak loading curves.
6. 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 )
7. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than2000m(6500ft).

Technical drawings

DDR-240B-48 Block Diagram — Block Diagram

DDR-240B-48 Derating Curve — Derating Curve

DDR-240B-48 Function Manual — Function Manual

DDR-240B-48 Input Under-Voltage Protection — Input Under-Voltage Protection

DDR-240B-48 Efficiency vs Load & Vin Curve — Efficiency vs Load & Vin Curve

DDR-240B-48 D D R - 2 4 0 series — D D R - 2 4 0 series

DDR-240B-48 Mechanical Specification — Mechanical Specification

Typical applications

Downloads

Certificates3

CE Certificate(DDR-240)(EN) PDF Download

UL Certificate(DDR-240)(EN) PDF Download

EMC Certificate(DDR-240)(EN) PDF Download

Catalogues2

Mean Well DC-DC Catalog PDF Download

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the DDR-240B-48 to generate a 48V supply for PoE switches from a 24V battery bank?

Yes. The DDR-240B-48 accepts 16.8-33.6V DC input and outputs 48V at up to 5A (240W). It can step up a 24V battery bus to 48V for powering PoE switches, PoE injectors, or 48V networking equipment in remote or off-grid installations.

Is the DDR-240B-48 suitable for powering 48V telecom equipment from a 24V DC source?

Yes. The DDR-240B-48 converts a 16.8-33.6V DC input to a regulated 48V at 5A. This makes it well suited for stepping up a 24V bus to the 48V nominal level required by telecom equipment, base station equipment, or DC power distribution units.

Can the DDR-240B-48 power 48V motor controllers or servo drives in an automation panel?

The DDR-240B-48 provides 240W at 48V/5A, which can power small 48V brushless DC motor controllers, servo drives, or stepper motor drivers. For motor loads with high inrush currents, verify that peak demand does not exceed the converter's 7.5A (360W) peak rating for 3 seconds max.

Can the DDR-240B-48 operate in an unventilated outdoor enclosure in desert or tropical climates?

The DDR-240B-48 is rated for -40°C to +70°C operation, with output derating at higher temperatures per the derating curve. In sealed outdoor enclosures exposed to direct sun in hot climates, internal temperatures can exceed ambient significantly. Ensure adequate enclosure sizing or thermal management to keep internal temperature within the rated range, especially at full 240W load.

What input voltage range options are available for DDR-240 models with 48V output?

The DDR series offers three 240W/48V models with different input ranges: DDR-240B-48 (16.8-33.6V input), DDR-240C-48 (33.6-67.2V input), and DDR-240D-48 (67.2-154V input). Each delivers 48V at 5A. Select the variant that matches your DC source voltage.

Can the DDR-240B-48 be used in a renewable energy system to step up 24V solar battery output to 48V for an inverter input stage?

Yes. The DDR-240B-48 can convert a 24V solar battery bank (within 16.8-33.6V) to 48V at up to 5A for feeding inverter input stages, charge controllers, or 48V DC distribution buses. The 4KVdc I/O isolation provides galvanic separation between the battery bank and the 48V bus.

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