MEAN WELL WDR-240-48 DIN Rail Power Supply 240W 48V 5A 3-Phase Input

Industrial automation and control systems often face unstable power inputs, but the MEAN WELL WDR-240-48 DIN rail power supply delivers clean, reliable 48 V DC output even from harsh 3-phase AC mains ranging from 180 to 550 V. This 240 W unit is built to keep your sensitive equipment running without interruption, thanks to its wide input range and robust protection features.

Who is it for

This power supply is ideal for system integrators, panel builders, and maintenance engineers who need a dependable power source for industrial control panels, factory automation, and process control equipment. It's particularly suited for environments with fluctuating or high-voltage 3-phase power, such as manufacturing plants, water treatment facilities, and renewable energy installations.

Main features

• Wide 3-phase input range: 180–550 V AC (47–63 Hz) for global compatibility and resilience to voltage swings.
• High efficiency up to 91% reduces energy waste and heat generation, lowering cooling costs.
• Comprehensive protection: short circuit, overload, over voltage, and over temperature safeguard both the supply and connected loads.
• Adjustable output voltage (48–55 V DC) allows fine-tuning for specific application requirements.
• DIN rail mounting for quick installation in standard industrial enclosures.
• Free air convection cooling – no fan means silent operation and less maintenance.
• Hold-up time of 18 ms at full load ensures stable output during brief input interruptions.
• Complies with UL 508 and TUV EN60950-1 safety standards, plus industrial EMC standards.

Specifications

• Output power: 240 W
• Output voltage: 48 V DC (adjustable 48–55 V)
• Output current: 5 A
• Input voltage: 180–550 V AC, 3-phase
• Input frequency: 47–63 Hz
• Efficiency: 91%
• Hold-up time: 18 ms (at full load, 400 V AC input)
• Isolation voltage: I/P-O/P 3 kV AC, I/P-FG 2 kV AC, O/P-FG 0.5 kV AC
• Operating temperature: -30 to +70 °C
• Cooling: Free air convection
• Safety standards: UL 508, TUV EN60950-1
• EMC: EN61000-6-2 (industrial immunity), EN61000-3-2 (harmonic current)

Tips

When installing, ensure adequate spacing around the unit for convection cooling. For 3-phase systems, verify phase balance and use appropriate fusing. The adjustable output can compensate for voltage drop over long cable runs – measure at the load and adjust accordingly. Pair with a suitable DIN rail and consider a redundancy module for critical applications.