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Mean Well DDR-120A-12 DC-DC Converter - 99.6W - 9~18V in 12V out

Name: Mean Well DDR-120A-12 DC-DC Converter - 99.6W - 9~18V in 12V out
Brand: Mean Well
SKU: DDR-120A-12
Price: 68.88 USD
Availability: InStock

2:1 or 4:1 wide input rangefanless design4KVdc I/O isolationultra slim dimensions

SKU:

DDR-120A-12

$68.88 USD

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DDR-120A-12

DDR-120A-12 12V out 100W In stock $68.88 USD

DDR-120A-24 24V out 100W In stock $63.99 USD

DDR-120A-48 48V out 100W Low stock $61.84 USD

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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

Brand

Mean Well
Series

DDR Series
Power Rating

99.6 Watt
Output Voltage

12 Volt
Rated Current

8.3 Ampere
Input Voltage

9V~18V
No of Output

1
Dimming Control

None
Standards Met

CE,EMC
Operation Mode

Constant Voltage
Operating Temperature

-40°C~85°C
Warranty

2 Year
Length

4.93 in
Width

4.02 in
Height

1.26 in
Weight

1.12 lb

Frequently Asked Questions

Can I use the DDR-120A-12 to power 12V embedded systems in a DIN rail control panel?

Yes. The DDR-120A-12 delivers 12V at up to 8.3A (99.6W), which suits many embedded controllers and single-board computers mounted in DIN rail enclosures. Its 9–18V DC input range is designed for battery-bus or low-voltage DC distribution systems commonly found in telecom and mobile equipment.

Is the DDR-120A-12 suitable for powering 12V sensors and I/O modules in industrial automation?

It can work well for sensor loops and I/O modules that run on 12V DC, provided total current draw stays within 8.3A. The fanless design and 4KVdc input-to-output isolation help protect sensitive measurement equipment from electrical noise in industrial environments.

Can I use this converter to step down a 12V battery bank to a regulated 12V rail?

The DDR-120A-12 accepts 9–18V DC input, so a nominal 12V battery source falls within range. It provides a regulated, isolated 12V output at up to 8.3A, which is useful for isolating sensitive loads from battery voltage fluctuations in mobile or off-grid installations.

Will the DDR-120A-12 operate reliably in an unheated outdoor cabinet during winter?

The DDR-120A-12 is rated for an operating temperature range of -40°C to +85°C, so it can handle extreme cold without derating. Its fanless, convection-cooled design means there are no moving parts to fail in harsh conditions, though the enclosure should protect it from direct moisture exposure.

How does the DDR-120A-12 compare to other models in the DDR-120 series?

The DDR-120A sub-series accepts 9–18V DC input and comes in 12V (99.6W, 8.3A), 24V (100.8W, 4.2A), and 48V (100.8W, 2.1A) output variants. The DDR-120B accepts 16–33V input, the DDR-120C accepts 33–67V input, and the DDR-120D accepts 67–154V input, each available in 12V, 24V, and 48V outputs at 120W. All share the same 125.2 x 102.0 x 32.0 mm DIN rail form factor.

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Model	Power	Voltage	Current	IP Rating	Price
Mean Well DDR-120A-24 DC-DC Converter - 100.8W - 9~18V in 24V out	100.8W	24V	4.2A	Indoor	$63.99	View
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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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

Mean Well DDR-120A-12 DC-DC Converter - 99.6W - 9~18V in 12V out

Select model — 3 in this family

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Frequently Asked Questions

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Mean Well DDR-120A-12 DC-DC Converter - 99.6W - 9~18V in 12V out

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