Mean Well DDR-240B-24 DC-DC Converter - 240W - 16.8~33.6V in 24V out - Auckland Distributor NZ

Overview

DDR-240B-24 is the 24V output model of this series: rated current 10A, 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-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: 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: 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: 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 -----
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-240B-24 Block Diagram — Block Diagram

DDR-240B-24 Derating Curve — Derating Curve

DDR-240B-24 Function Manual — Function Manual

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

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

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

DDR-240B-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-240B-24 to power a 24V industrial automation system from a 24V battery bank?

Yes, provided the battery voltage stays within the 16.8-33.6V input range. The DDR-240B-24 delivers 240W at 24V/10A, which is substantial enough to power PLCs, motor drives, HMI panels, and multiple I/O modules in a DIN rail-mounted automation system fed from a 24V battery bus.

Is the DDR-240B-24 suitable for powering 24V LED lighting systems in a DC microgrid or solar installation?

The DDR-240B-24 accepts 16.8-33.6V DC input and provides 24V at up to 10A. It can convert a 24V or 28V solar battery bus to a regulated 24V output for LED lighting panels, strips, or fixtures totaling up to 240W. The 4KVdc isolation protects the lighting from battery-side transients.

Can the DDR-240B-24 power 24V solenoid valves and actuators in a process automation cabinet?

Yes. With 240W (24V/10A) of output capacity, the DDR-240B-24 can drive multiple 24V solenoid valves, pneumatic actuators, and relay coils simultaneously. Its compact DIN rail mounting (40mm wide) makes it well suited for enclosed process automation cabinets where space is a concern.

Does the DDR-240B-24 require active cooling or ventilation?

The DDR-240B-24 is rated for an operating temperature of -40°C to +70°C. At full 240W load, adequate airflow around the unit is recommended to dissipate heat. In tightly sealed enclosures at high ambient temperatures, output derating applies per the derating curve in the Mean Well datasheet.

How does the DDR-240B-24 compare to other 240W models in the DDR series?

The DDR-240 series at the 24V output level includes the DDR-240B-24 (16.8-33.6V input), DDR-240C-24 (33.6-67.2V input), and DDR-240D-24 (67.2-154V input). All deliver 240W at 24V/10A. The B, C, and D suffixes denote different input voltage ranges to match different DC bus standards.

Can I use the DDR-240B-24 in a vehicle or mobile application with a 24V nominal electrical system?

Yes. A 24V vehicle electrical system typically operates between 20V and 30V, which falls within the DDR-240B-24's 16.8-33.6V input range; at the low end of the range output derating applies per the datasheet curve. The converter provides a stable, isolated 24V/10A output for onboard electronics, communication equipment, or auxiliary systems. It is rated for -40°C to +70°C operation.

Payment & Security

Payment methods

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Model	Power	Voltage	Current	IP Rating
Mean Well DDR-240B-48 DC-DC Converter - 240W - 16.8~33.6V in 48V out 5A	240W	48V	5A	IP20	View

Please log in to write a review.

{ "id":8441764512043, "variants" :[{ "context":"default", "variant_id": 45707097669931, "sku":"DDR-240B-24", "inventory_qty" : 8, "customer" :false, "custom_html" :"\u003ca class=\"text-current logged-out-price logged-out\" href=\"https:\/\/wellforces.co.nz\/customer_authentication\/redirect?locale=en\u0026region_country=NZ\"\u003e\n \u003cspan \u003ePlease \u003c\/span\u003e \u003cspan class=\"login-text\"\u003eLogin\u003c\/span\u003e \u003cspan\u003e for Pricing\u003c\/span\u003e\n \u003c\/a\u003e", "volume_html" :"\u003cvolume-pricing class=\"parent-display inside_product_form\" id=\"volume-pricing-main\" \u003e\u003c\/volume-pricing\u003e" } ] }

Mean Well DDR-240B-24 DC-DC Converter - 240W - 16.8~33.6V in 24V out 10A

Select model — 16 in this family

Overview

Features

Specifications

OUTPUT

INPUT

PROTECTION

FUNCTION

ENVIRONMENT

SAFETY & EMC

OTHERS

Technical drawings

Typical applications

Downloads

Certificates3

Catalogues2

FAQ

Payment & Security

Other DDR-240B Models

Write a review

Your cart

Mean Well DDR-240B-24 DC-DC Converter - 240W - 16.8~33.6V in 24V out 10A

Features

Typical applications

Company Information

Services and Support

Choose options