MEAN WELL MDR-20-5 DIN Rail Power Supply 15W 5V 3A

Control panel builders and industrial automation engineers often need a compact, reliable 5V DC source that mounts directly onto a DIN rail without extra brackets. The MEAN WELL MDR-20-5 delivers exactly that: a 15W power supply with a stable 5V output, ready for sensors, controllers, and low-voltage logic circuits in tight enclosures.

Key specifications

• Output: 5 VDC, 3 A, 15 W
• Input: 85–264 VAC, 47–63 Hz
• Efficiency: 76% typical
• Operating temperature: -20 to 70 °C
• Protection: overload, short circuit, over voltage
• Cooling: free air convection
• Mounting: DIN rail TS-35/7.5 or TS-35/15
• Safety: UL508, EN60950-1
• EMC: EN55022 Class B

Why choose it

The MDR-20-5 is built for long-term industrial use. Its slim plastic housing saves space on the rail, and the wide input range handles unstable mains voltages. The adjustable output (4.75–5.5 VDC) lets you fine-tune for voltage drop in long cable runs. No fan means no noise and no moving parts to fail.

Ideal use cases

• Powering PLCs, HMIs, and fieldbus modules
• Supplying 5V logic for sensors and relays
• Building automation and access control panels
• Small machines and test equipment

Good to know

The unit operates in 20–90% non-condensing humidity and can be stored from -40 to 85 °C. Inrush current is limited to 60A at 230VAC, so it won't trip standard breakers. Installation is tool-free: just snap it onto the rail and wire the screw terminals.