MEAN WELL MDR-20-15 DIN Rail Power Supply 15V DC 1.34A 20W

The MEAN WELL MDR-20-15 stands out among compact DIN rail power supplies by delivering a stable 15 V DC output with an efficiency of 84%, all within a slim 22.5 mm wide housing. This unit is engineered for industrial control panels, building automation, and machine builders who need reliable power without wasting valuable rail space. Unlike many budget alternatives, it includes a DC OK relay contact for remote status monitoring and a no-load power consumption of less than 0.5 W, making it suitable for energy-conscious installations.

Highlights

• Universal AC input range 85–264 VAC (120–370 VDC) for worldwide use.
• High efficiency up to 84% reduces heat and energy costs.
• Slim DIN rail design: only 22.5 mm width, fits TS-35/7.5 or TS-35/15 rails.
• Built-in protections: short circuit, overload, and over voltage.
• DC OK relay contact for system monitoring.
• Low no-load power consumption < 0.5 W meets energy-saving requirements.
• Certified to UL508, TUV EN60950-1, CB, and CE for global compliance.

In daily use

Installing the MDR-20-15 is straightforward: snap it onto a standard DIN rail, connect the input and output terminals, and it is ready to power sensors, controllers, or small actuators. The output voltage can be adjusted from 13.5 to 18 V DC via the built-in potentiometer, allowing fine-tuning for specific loads. With a wide operating temperature range of -20 to +70 °C and free air convection cooling, it performs reliably even in harsh environments. The LED indicator provides immediate visual confirmation of output status, while the relay contact can be wired to a PLC or alarm system for remote fault detection.

Full specifications

• Brand: MEAN WELL
• Model: MDR-20-15
• Output voltage: 15 V DC (adjustable 13.5–18 V)
• Output current: 1.34 A
• Output power: 20.1 W
• Input voltage range: 85–264 VAC (120–370 VDC)
• Frequency range: 47–63 Hz
• Efficiency: 84%
• Ripple & noise: 120 mVp-p
• Isolation voltage: 3 kVAC (input to output)
• Protection: short circuit, overload, over voltage
• Operating temperature: -20 to +70 °C
• Cooling: free air convection
• Mounting: DIN rail TS-35/7.5 or TS-35/15
• DC OK signal: relay contact
• No-load power consumption: < 0.5 W
• Certifications: UL508, TUV EN60950-1, CB, CE
• Dimensions (W x H x D): 22.5 x 90 x 100 mm
• Weight: 0.19 kg

Final note

The MDR-20-15 is a proven workhorse for low-power DIN rail applications, combining compact size, robust protection, and energy efficiency. Its adjustable output and monitoring features make it a versatile choice for system integrators and OEMs seeking a dependable power source that meets international safety standards.