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Mean Well DDR-120C-48 DC-DC Converter - 120W - 33.6~67.2V in 48V out
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Mean Well DDR-120C-48 DC-DC Converter - 120W - 33.6~67.2V in 48V out
The DDR-120C is a 120W DIN Rail type DC-DC converter for railway and industrial applications. With a 33.6~67.2Vdc input range (nominal 48Vdc), it converts from 48Vdc on-board bus supplies to isolated 12V, 24V, or 48V outputs. Compliant with EN50155:2021 S1 level and rated per IEC61373 for shock and vibration, it operates from -40~+70°C in demanding transport environments.
Key Features
- ✓ Input voltage range: 33.6~67.2Vdc (nominal 48Vdc)
- ✓ 32mm width — DIN rail TS-35 compatible
- ✓ DC output voltage adjustable ±10%
- ✓ 4KVdc reinforced I/O isolation
- ✓ Wide operating temperature: -40°C ~ +70°C
- ✓ Protections: Overload / Over voltage / Reverse polarity / Under voltage lockout
- ✓ EN50155:2021 S1 level compliance (interruption of voltage supply)
- ✓ Railway standards: EN45545-2 (fire protection), EN50155 / IEC60571, IEC61373 (shock & vibration)
- ✓ Safety approvals: IEC 62368-1, UL 62368-1, AS/NZS 62368.1, EAC TP TC 004
- ✓ 3 years warranty
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BrandMean Well
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SeriesDDR Series
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Power Rating120 Watt
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Output Voltage48 Volt
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Rated Current2.5 Ampere
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Input Voltage33.6V~67.2V
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No of Output1
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Dimming ControlNone
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Standards MetCE,EMC
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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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Width4.02 in
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Height1.26 in
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Weight1.12 lb
::specification::
Frequently Asked Questions
Can I use the DDR-120C-48 to convert a 48V battery bank to 48V regulated DC for industrial automation equipment?
Yes. The DDR-120C-48 accepts a wide DC input range of 33.6-67.2V and outputs a regulated 48V at up to 2.5A (120W). This makes it well suited for converting unregulated battery or solar bus voltages into a stable 48V rail for PLCs, sensors, and other DIN rail-mounted automation devices.
Is the DDR-120C-48 suitable for powering 48V PoE switches in a telecom or IT cabinet?
Yes. With 120W at 48V and 2.5A output, it can supply a small PoE switch or injector from a 33.6-67.2V DC bus. The fanless design eliminates acoustic noise in enclosed cabinets, and the 4KVdc I/O isolation protects sensitive networking equipment from ground loops or transients on the input side.
Can I use the DDR-120C-48 to step down a 60V solar charge bus to 48V for embedded systems?
Yes, provided your solar bus stays within the 33.6-67.2V input window. The DDR-120C-48 will regulate the output to 48V regardless of input fluctuations within that range. Its ultra-slim 32mm width and DIN rail mount make it easy to integrate into a solar charge controller enclosure.
Will the DDR-120C-48 operate reliably in an unheated outdoor control cabinet?
Yes. It is rated for -40°C to +85°C operating temperature, which covers unheated outdoor enclosures in most climates. The fanless convection-cooled design means there are no moving parts to fail in dusty or humid conditions, though the unit itself does not carry an IP rating so it should be mounted inside a sealed enclosure.
What are the differences between the DDR-120A, 120B, 120C, and 120D variants at 48V?
All four output 48V on a DIN rail, but they differ in input range and power. The DDR-120A-48 accepts 9.2-18V DC input and delivers 100.8W at 2.1A. The DDR-120B-48 accepts 16.8-33.6V and delivers 120W at 2.5A. The DDR-120C-48 accepts 33.6-67.2V and delivers 120W at 2.5A. The DDR-120D-48 accepts 67.2-154V and delivers 120W at 2.5A. Choose the variant whose input range matches your DC bus voltage.
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Other DDR-120C Models
2 other models| Model | Power | Voltage | Current | IP Rating | Price | |
|---|---|---|---|---|---|---|
| Mean Well DDR-120C-24 DC-DC Converter - 120W - 33.6~67.2V in 24V out | 120W | 24V | 5A | Indoor | $61.10 | View |
| Mean Well DDR-120C-12 DC-DC Converter - 120W - 33.6~67.2V in 12V out | 120W | 12V | 10A | Indoor | $67.27 | View |
