MEAN WELL MDR-40-24 DIN Rail Power Supply 24V 40W

Industrial DIN rail power supply delivering stable 24V DC output with 40W rated power, engineered for reliable performance in automation and control systems. The MDR-40-24 features a wide input range of 85-264VAC and free air convection cooling, ensuring efficient operation without forced airflow. Its compact design and TS-35/7.5 or 15 rail mounting make it ideal for space-constrained installations.

Advantages

High efficiency up to 88% reduces energy consumption and heat generation. Comprehensive protections against short circuit, overload, and over voltage safeguard connected equipment. The built-in DC OK relay contact provides real-time status monitoring, while the adjustable output voltage (24-28V) allows flexibility for voltage drop compensation. With an MTBF exceeding 500,000 hours, this power supply offers long-term dependability.

Suitable for

• Industrial automation and PLC systems
• Building management and HVAC controls
• Security and access control panels
• Test and measurement equipment
• LED lighting and small motor drives

Key specifications

• Input: 85-264VAC / 120-370VDC, 47-63Hz
• Output: 24V DC, 1.67A, 40W
• Efficiency: 88%
• Ripple & noise: 150mVp-p
• Operating temperature: -20 to +70°C
• Isolation: 3kVAC input to output
• Certifications: UL508, TUV EN60950-1, CE

Recommendations

For optimal performance, mount the unit on a DIN rail in a well-ventilated enclosure. Ensure adequate clearance around the power supply to allow free air convection. Use appropriate wire gauges for input and output connections, and verify that the load does not exceed 40W. The adjustable output voltage can be set to compensate for line drops; however, avoid exceeding the maximum rated voltage to maintain protection integrity.