MEAN WELL LRS-75-5 70W 5V 14A Enclosed Switching Power Supply

Delivering 70 watts of reliable DC power from a compact, perforated metal chassis, the MEAN WELL LRS-75-5 is a single-output switching power supply engineered for industrial automation, LED lighting, and general electronics. Its free-air convection cooling eliminates fan noise while maintaining full performance across a wide -30°C to +70°C operating range.

Overview

The LRS-75-5 converts universal AC input (85–264 VAC or 120–370 VDC) into a tightly regulated 5 V DC output with up to 14 A of current. With an efficiency of 86% and ripple & noise as low as 80 mVp-p, it provides clean, stable power for sensitive loads. The output voltage is adjustable from 4.75 V to 5.5 V via a built-in potentiometer, allowing fine-tuning for specific applications.

What stands out

• High power density: 70 W in a slim, low-profile metal case
• Fanless design with free air convection for silent operation
• Wide operating temperature range from -30°C to +70°C
• Comprehensive protection: short circuit, overload, over voltage, and over temperature
• Compliance with UL62368-1, TUV EN62368-1, CB, and CE safety standards
• High reliability with MTBF over 700,000 hours

Technical details

• Output power: 70 W
• Output voltage: 5 V DC (adjustable 4.75–5.5 V)
• Output current: 14 A
• Input voltage: 85–264 VAC / 120–370 VDC
• Efficiency: 86%
• Ripple & noise: 80 mVp-p
• Cooling: free air convection
• Mounting: chassis mount
• Enclosure: perforated metal case
• Operating temperature: -30°C to +70°C
• Protection: short circuit, overload, over voltage, over temperature
• Safety standards: UL62368-1, TUV EN62368-1, CB, CE
• MTBF: >700,000 hours

Our verdict

The MEAN WELL LRS-75-5 is a workhorse power supply that balances performance, reliability, and value. Its rugged metal housing and wide temperature tolerance make it suitable for demanding environments, while the adjustable output adds flexibility for prototyping and production.