MEAN WELL DIN Rail Power Supply MDR-40-48 48V DC 0.83A 40W

Industrial control panels and building automation systems often need a reliable 48V DC source mounted directly on a DIN rail. The MEAN WELL MDR-40-48 fits that role, delivering 40W from a compact housing that snaps onto TS-35/7.5 or TS-35/15 rails. Its universal AC input (85–264V AC) and wide DC input (120–370V DC) make it suitable for a range of installations.

Key specifications

• Output voltage: 48V DC
• Output current: 0.83A
• Output power: 40W
• Input voltage: 85–264V AC or 120–370V DC
• Efficiency: 88%
• Ripple and noise: 150mVp-p
• Voltage adjustment range: 48–53V DC
• Isolation voltage: 3kV AC (input to output)
• Operating temperature: -20°C to +70°C
• Cooling: free air convection
• Protections: short circuit, overload, over voltage
• Mounting: DIN rail TS-35/7.5 or TS-35/15
• Connectors: screw terminal block (input and output)

Why choose it

The MDR-40-48 provides a stable 48V DC output with a wide input range, making it adaptable to different mains voltages. Its DIN rail mounting simplifies installation in control cabinets, and the built-in protections help safeguard connected equipment.

Ideal use cases

• Powering sensors, relays, and controllers in industrial automation
• Building management systems and HVAC control panels
• Distributed power architectures where DIN rail mounting is standard

Good to know

The unit operates by free air convection, so no fan is required, reducing maintenance and noise. Screw terminal connections allow secure wiring without special tools.