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Mean Well DDR-120A-24 DC-DC Converter - 100.8W - 9~18V in 24V out
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Mean Well DDR-120A-24 DC-DC Converter - 100.8W - 9~18V in 24V out
The DDR-120A is a 120W DIN Rail type DC-DC converter for railway and industrial applications. With a 9~18Vdc input range (nominal 12Vdc), it steps down from 12Vdc on-board bus supplies to isolated 12V, 24V, or 48V outputs. Compliant with EN50155:2021 S1 level and rated to withstand shock and vibration per IEC61373, it operates reliably from -40~+70°C in demanding transport environments.
Key Features
- ✓ Input voltage range: 9~18Vdc (nominal 12Vdc)
- ✓ 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 Rating100.8 Watt
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Output Voltage24 Volt
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Rated Current4.2 Ampere
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Input Voltage9V~18V
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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-120A-24 to power 24V PLC modules from a low-voltage DC bus?
Yes. The DDR-120A-24 converts a 9–18V DC input to a regulated 24V output at up to 4.2A (100.8W), which is sufficient for many compact PLC systems and their associated I/O modules. The 4KVdc isolation protects the control system from noise on the input bus.
Is this converter appropriate for powering 24V solenoid valves in a mobile hydraulic system?
The DDR-120A-24 can supply 24V at 4.2A from a 9–18V DC source such as a vehicle battery system. Its DIN rail mounting, wide operating temperature range of -40°C to +85°C, and fanless design make it practical for mobile machinery cabinets where vibration and temperature swings are common.
Can I use the DDR-120A-24 to generate 24V for instrumentation from a 12V solar battery bank?
Yes, as long as the battery voltage stays within the 9–18V input range. The DDR-120A-24 provides an isolated 24V output at up to 4.2A, making it suitable for stepping up a 12V nominal battery bus to power 24V field instruments or data acquisition equipment in remote solar-powered installations.
Does the DDR-120A-24 need forced airflow in a sealed DIN rail enclosure?
No. The DDR-120A-24 uses a fanless convection-cooled design, so it does not require forced airflow. It operates from -40°C to +85°C, but in a sealed enclosure you should verify that internal ambient temperature stays within that range under full 100.8W load to avoid thermal derating.
Is the DDR-120A-24 suitable for powering 24V HMI touchscreens in a process control panel?
The DDR-120A-24 outputs 24V at up to 4.2A, which is enough for most industrial HMI panels. Its ultra-slim 32 mm width conserves DIN rail space, and the 4KVdc isolation helps prevent ground loops between the low-voltage DC input bus and sensitive display electronics.
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Other DDR-120A Models
1 other model| Model | Power | Voltage | Current | IP Rating | Price | |
|---|---|---|---|---|---|---|
| Mean Well DDR-120A-48 DC-DC Converter - 100.8W - 9~18V in 48V out | 100.8W | 48V | 2.1A | Indoor | $61.84 | View |
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