MEAN WELL WDR-120-12 DIN Rail Power Supply 120W 12V 10A, 180-550VAC Input

In industrial control cabinets and building automation panels, the MEAN WELL WDR-120-12 delivers stable 12 V DC power for PLCs, sensors, and actuators. Its wide input range of 180–550 V AC makes it suitable for single-phase 230 V or two-phase 400 V mains, while the slim DIN rail housing saves space on crowded rails.

Key specifications

• Output: 12 V DC, 10 A, 120 W
• Input: 180–550 V AC, 47–63 Hz
• Efficiency: 89%
• Ripple & noise: 120 mVp-p
• Voltage adjustment: 12–14 V DC
• Hold-up time: 50 ms at 400 V AC
• Protections: short circuit, overload, over voltage, over temperature
• Isolation: 3 kV AC input to output
• Operating temperature: -30 to +70 °C
• Cooling: free air convection
• Mounting: DIN rail TS-35/7.5 or 15

Why choose it

The WDR-120-12 is engineered for harsh electrical environments. Its wide input voltage range tolerates unstable mains, and the built-in protections safeguard both the supply and connected loads. Free air convection cooling means no fan noise or maintenance, and the compact metal housing ensures durability.

Ideal use cases

• Industrial automation and control systems
• Building management and HVAC panels
• Telecommunication equipment
• LED lighting and signage
• Test and measurement instruments

Good to know

The unit can be adjusted from 12 to 14 V DC via the front-panel potentiometer to compensate for voltage drops in long cable runs. It holds up for 50 ms during brief mains interruptions, preventing resets of sensitive electronics. Installation is tool-free: simply snap onto a standard DIN rail.