Mean Well DDR-240C-24 DC-DC Converter - 240W - 33.6~67.2V in 24V out

Overview

DDR-240C-24 is the 24V output model of this series: rated current 10A, rated power 240W, typical efficiency 91%.

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-240C-24Specifications from the official datasheet (2026-09-10 edition)

OUTPUT

DC VOLTAGE: 24V
RATED CURRENT: 10A
CURRENT RANGE: 0 ~ 10A
RATED POWER: 240W
PEAK CURRENT: 15A
PEAK POWER^Note.5: 360W (3sec.)
RIPPLE & NOISE (max.)^Note.2: 80mVp-p
VOLTAGE ADJ. RANGE: 24 ~ 28V
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.): 5.6A @48Vdc
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: 28.8 ~ 35V 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: 48Vin (C - type) :Power ON≥33.6V , OFF≤33V

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 -----
Harmonic Current ----- -----
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	-----
Harmonic Current	-----	-----

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-240C-24 Block Diagram — Block Diagram

DDR-240C-24 Derating Curve — Derating Curve

DDR-240C-24 Function Manual — Function Manual

DDR-240C-24 Input Under-Voltage Protection — Input Under-Voltage Protection

DDR-240C-24 Efficiency vs Load & Vin Curve — Efficiency vs Load & Vin Curve

DDR-240C-24 D D R - 2 4 0 series — D D R - 2 4 0 series

DDR-240C-24 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-240C-24 to convert a 48V battery bank to 24V for industrial automation equipment?

Yes. The DDR-240C-24 accepts 33.6-67.2V DC input and outputs 24V at up to 10A (240W), so it is well suited for stepping down a 48V battery system to power 24V PLCs, sensors, and motor drives in DIN rail-based automation panels. The 4KVdc I/O isolation protects sensitive control equipment from the battery bus.

Is the DDR-240C-24 suitable for powering 24V DC loads from a 48V telecom bus?

Yes. Telecom DC buses commonly operate at 48V nominal, which falls within the DDR-240C-24's 33.6-67.2V input range. At 240W and 10A output, it can supply 24V peripheral equipment such as switches, routers, or access controllers mounted in standard telecom racks.

Can the DDR-240C-24 power 24V embedded computing systems in a mobile or vehicle application?

Yes. If the vehicle's DC bus voltage stays within 33.6-67.2V, the DDR-240C-24 provides a stable 24V rail at up to 10A. Its -40°C to +70°C operating range and compliance with EN50155 / IEC61373 for shock and vibration make it suitable for enclosures in buses, trains, or heavy equipment where vibration and temperature extremes are common.

Will the DDR-240C-24 operate reliably in an unheated outdoor DIN rail enclosure?

Yes. The DDR-240C-24 is rated for -40°C to +70°C operation (with derating at high temperatures per the derating curve) and 5-95% RH non-condensing. As long as the enclosure shields it from direct water ingress and condensation, it will operate in cold-climate outdoor cabinets, rooftop equipment housings, and similar exposed installations.

Can I use the DDR-240C-24 in a solar energy system to step down a 48V panel string for 24V loads?

The DDR-240C-24 accepts 33.6-67.2V DC input, which can accommodate a 48V nominal solar bus with typical voltage fluctuations. It provides 240W at 24V/10A for loads such as monitoring systems, communication radios, or lighting controllers in off-grid solar installations.

What are the differences between the DDR-240B, DDR-240C, and DDR-240D models at the 24V output level?

All three provide 240W at 24V/10A output. The key difference is the input voltage range: the DDR-240B-24 accepts 16.8-33.6V DC (suited to 24V bus systems), the DDR-240C-24 accepts 33.6-67.2V DC (suited to 48V bus systems), and the DDR-240D-24 accepts 67.2-154V DC (suited to high-voltage DC distribution). All share the same 40 x 125.2 x 113.5 mm DIN rail form factor.

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Model	Power	Voltage	Current	IP Rating
Mean Well DDR-240C-48 DC-DC Converter - 240W - 33.6~67.2V in 48V out 5A	240W	48V	5A	IP20	View

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Mean Well DDR-240C-24 DC-DC Converter - 240W - 33.6~67.2V in 24V out 10A

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