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Mean Well DDR-240D-24 DC-DC Converter - 240W - 67.2~154V in 24V out
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Mean Well DDR-240D-24 DC-DC Converter - 240W - 67.2~154V in 24V out
The DDR-240D is a 240W DIN Rail type DC-DC converter designed for rolling stock and railway applications requiring compliance with EN50155 standards. With an input range of 67.2~154Vdc (nominal 110Vdc), it converts from standard on-board DC bus supplies to isolated 12V, 24V, or 48V outputs. Built to withstand shock and vibration per IEC61373, it operates reliably from -40~+70°C and supports current sharing for higher-power parallel configurations.
Key Features
- ✓ 40mm wide — DIN rail TS-35 compatible
- ✓ Input voltage range: 67.2~154Vdc (nominal 110Vdc)
- ✓ DC output voltage adjustable ±10%
- ✓ 4KVdc reinforced I/O isolation
- ✓ Wide operating temperature: -40°C ~ +70°C
- ✓ Protections: Short circuit / Overload / Over voltage / Reverse polarity / Under voltage lockout
- ✓ DC OK relay contact output
- ✓ Remote ON/OFF control
- ✓ Current sharing up to 960W (parallel 3+1 units)
- ✓ Safety approvals: IEC 62368-1, UL 62368-1, AS/NZS 62368.1, EAC TP TC 004
- ✓ Railway standards: EN50155, IEC60571, IEC61373 (shock & vibration)
- ✓ 3 years warranty
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BrandMean Well
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SeriesDDR Series
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Power Rating240 Watt
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Output Voltage24 Volt
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Rated Current10 Ampere
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Input Voltage67.2V~154V
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No of Output1
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Dimming ControlNone
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Standards MetCE,EMC,UL
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Operation ModeConstant Voltage
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Operating Temperature-40°C~85°C
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Warranty2 Year
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Length4.93 in
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Width4.47 in
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Height1.57 in
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Weight1.68 lb
::specification::
Frequently Asked Questions
Can I use the DDR-240D-24 to convert a 110V DC distribution bus to 24V for control equipment?
Yes. The DDR-240D-24 accepts 67.2-154V DC input, which covers the standard 110V DC bus voltage used in legacy industrial plants, substations, and railway systems. It delivers 24V at up to 10A (240W) for PLCs, HMI panels, relays, and other DIN rail-mounted control devices.
Is the DDR-240D-24 suitable for converting high-voltage DC from a solar string to 24V for site monitoring?
Yes, provided the solar string voltage stays within 67.2-154V DC. The DDR-240D-24 outputs a stable 24V at up to 10A, which can power weather stations, data loggers, cameras, and communication equipment at remote solar farm sites without needing an AC inverter.
Can the DDR-240D-24 power 24V equipment in a railway signaling or rolling stock cabinet?
Yes. Railway DC buses often operate in the 72-110V DC range, which falls within the DDR-240D-24's 67.2-154V input window. The -40°C to +85°C operating range, fanless design, and 4KVdc I/O isolation make it well suited for the vibration, temperature extremes, and EMI present in railway environments.
Can the DDR-240D-24 be installed in harsh outdoor environments like utility substations?
The DDR-240D-24 operates from -40°C to +85°C and has no fan, which eliminates a common point of failure in dusty or corrosive environments. It should be mounted inside a weatherproof DIN rail enclosure to protect it from direct rain and condensation, but it handles wide temperature swings typical of substations.
Is the DDR-240D-24 appropriate for stepping down a 125V DC battery bank used in UPS backup systems?
Yes. A 125V DC battery bank is within the 67.2-154V input range. The DDR-240D-24 converts this to a regulated 24V at 10A (240W), suitable for powering emergency lighting controllers, alarm panels, or communication equipment that must run on the UPS-backed DC bus during outages.
What are the differences between the DDR-240B-24, DDR-240C-24, and DDR-240D-24?
All three deliver 240W at 24V/10A and share the same 125.2 x 113.5 x 40.0 mm DIN rail form factor. The DDR-240B-24 accepts 16.8-33.6V DC input (for 24V bus systems), the DDR-240C-24 accepts 33.6-67.2V DC input (for 48V bus systems), and the DDR-240D-24 accepts 67.2-154V DC input (for high-voltage DC distribution). Select based on your source bus voltage.
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Other DDR-240D Models
1 other model| Model | Power | Voltage | Current | IP Rating | Price | |
|---|---|---|---|---|---|---|
| Mean Well DDR-240D-48 DC-DC Converter - 240W - 67.2~154V in 48V out | 240W | 48V | 5A | Indoor | $97.44 | View |
