MEAN WELL DDR-120B-24 DIN Rail Power Supply 120W 24V 5A

Delivering 120 W of regulated 24 VDC output from a 48–150 VDC input, the MEAN WELL DDR-120B-24 is a high-efficiency DIN rail power supply built for demanding industrial and railway applications.

Overview

The DDR-120B-24 converts a wide DC input range of 48–150 VDC into a stable 24 VDC output with a rated current of 5 A. With efficiency up to 90% and free air convection cooling, it operates reliably across a broad temperature range of -30 to +70 °C. The unit mounts on standard DIN rails (TS-35/7.5 or TS-35/15) and provides comprehensive protection including short circuit, overload, over voltage, over temperature, and input reverse polarity.

What stands out

• Wide 48–150 VDC input range suits diverse DC power systems
• High efficiency up to 90% reduces energy waste and heat
• Full protection suite ensures long-term reliability
• Compact DIN rail design simplifies installation
• Compliant with EN50155 and EN45545-2 for railway use

Technical details

• Output voltage: 24 VDC (adjustable 24–28 VDC)
• Rated output current: 5 A
• Rated output power: 120 W
• Ripple & noise: 150 mVp-p max
• Isolation voltage: 4000 VDC (input to output)
• Operating temperature: -30 to +70 °C
• MTBF: >300K hrs per MIL-HDBK-217F

Our verdict

The DDR-120B-24 is a robust and efficient power solution for industrial automation and railway electronics, offering high reliability and flexible installation in a compact form factor.