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Mean Well DDRH-120-24 Ultra Wide Input DC-DC Converter, 120W 24V 5A

250~1500VDC 6:1 ultra-wide input rangewithstand 1700Vdc surge input for 10 seconds63mm slim widthDC output voltage adjustable 24~29V

SKU DDRH-120-24

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The DDRH-120 is a 120W high-reliability ultra-wide input DIN Rail DC-DC converter engineered for photovoltaic, renewable energy storage, and high-voltage industrial systems. Its 250~1500Vdc input range covers high-voltage DC bus and battery string sources, while 4KVac reinforced I/O isolation ensures clean, noise-free power conversion. Featuring fanless free air convection cooling and a DC OK relay output, the DDRH-120 reliably operates across a -40~+80℃ temperature range.

Key Features

✓ Ultra-wide 250~1500Vdc input range — high-voltage DC bus and battery string compatible
✓ DC output voltage adjustable ±10%
✓ 4KVac reinforced I/O isolation
✓ Cooling by free air convection — fanless design, no minimum load required
✓ Wide operating temperature: -40°C ~ +80°C
✓ DC OK relay contact output — signals supply status
✓ Protections: Short circuit / Overload / Over voltage / Reverse polarity / Under voltage lockout
✓ DIN rail TS-35 compatible
✓ Safety approvals: IEC62109-1, BS EN/EN62109-1, EAC TP TC 004
✓ 3 years warranty

Frequently Asked Questions

Can the DDRH-120-24 power 24V PLCs and industrial automation equipment?

Yes. The DDRH-120-24 provides 24V at up to 5A (120W), which is the standard supply voltage for most PLCs, I/O modules, and industrial automation controllers. It mounts on a DIN rail and operates from 250–1500VDC input, suitable for systems connected to medium-voltage DC distribution buses.

Is the DDRH-120-24 appropriate for powering 24V actuators and solenoid valves in a machine control cabinet?

The DDRH-120-24 delivers 5A at 24V, providing up to 120W for 24V actuators, solenoid valves, or relay coils in machine control applications. Verify that the combined inrush and steady-state load remains within the 5A continuous rating.

Can I use the DDRH-120-24 to step down a 600V or 1000V DC bus to 24V for instrumentation?

Yes. The DDRH-120-24 accepts 250–1500VDC input and can tolerate a 1700VDC surge for 10 seconds, making it well suited for stepping down high-voltage DC bus rails — such as 600V or 1000V traction or solar buses — to 24V for instrumentation and control circuits.

What operating temperature range does the DDRH-120-24 support?

The DDRH-120-24 operates from -40°C to +80°C, covering both arctic cold and high-ambient industrial environments. No derating information is provided for the upper boundary within the published specs.

What mounting form factor does the DDRH-120-24 use, and how wide is it?

The DDRH-120-24 is a DIN rail-mount converter measuring 63.0 × 125.2 × 115.0 mm with a 63mm slim width. It fits standard DIN rail enclosures and weighs 0.845 kg.

Can the output voltage of the DDRH-120-24 be trimmed above 24V?

Yes, the output voltage is adjustable from 24V up to 29V using the built-in trim function. This allows the output to be set precisely for loads with higher forward voltage requirements or to account for cable voltage drop.

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Model	Power	Voltage	Current	IP Rating
Mean Well DDRH-120-48 Ultra Wide Input DC-DC Converter, 120W 48V 2.5A	120W	48V	2.5A	Indoor	View
Mean Well DDRH-120-32 Ultra Wide Input DC-DC Converter, 120W 32V 3.75A	120W	32V	3.75A	Indoor	View
Mean Well DDRH-120-12 Ultra Wide Input DC-DC Converter, 100.8W 12V 8.4A	100.8W	12V	8.4A	Indoor	View

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Key Features

✓ Ultra-wide 250~1500Vdc input range — high-voltage DC bus and battery string compatible

✓ DC output voltage adjustable ±10%

✓ 4KVac reinforced I/O isolation

✓ Cooling by free air convection — fanless design, no minimum load required

✓ Wide operating temperature: -40°C ~ +80°C

✓ DC OK relay contact output — signals supply status

✓ Protections: Short circuit / Overload / Over voltage / Reverse polarity / Under voltage lockout

✓ DIN rail TS-35 compatible

✓ Safety approvals: IEC62109-1, BS EN/EN62109-1, EAC TP TC 004

✓ 3 years warranty

Mean Well DDRH-120-24 Ultra Wide Input DC-DC Converter, 120W 24V 5A

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Mean Well DDRH-120-24 Ultra Wide Input DC-DC Converter, 120W 24V 5A

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