Power Supply Unit MEAN WELL SDR-75-24 77W Metallic

The MEAN WELL SDR-75-24 77W Metallic is a compact industrial power supply delivering 24V DC output with continuous 77W power and a peak capability up to 150% for short durations. Designed for DIN-rail mounting in control cabinets, it accepts a wide AC input range from 88 to 264V and offers high energy conversion with up to 90% efficiency. The metal housing and convection cooling enable silent operation without fans, while safety certifications for industrial environments ensure compliance with relevant standards.

Advantages

This power supply combines compact dimensions with robust performance: a narrow 32 mm width allows dense installation in control panels, and the 77W continuous output with 150% peak load supports demanding startup or inrush current conditions. High efficiency and low dissipation reduce heat generation, improving reliability and lowering ambient temperature stress. The unit passes a 100% full load burn-in test and has a high MTBF, contributing to long service life. Mounting on standard TS-35/7.5 or 15 DIN rails simplifies integration and maintenance.

Suitable for

• Industrial automation control cabinets
• Signal and communication equipment
• PLC and I/O modules
• Machine and process control systems
• Remote monitoring and instrumentation

Key specifications

• Output voltage: 24 V DC
• Continuous output power: 77 W
• Peak power capability: up to 150% (short duration)
• Input voltage range: 88–264 V AC
• Efficiency: up to 90%
• Cooling method: free air convection (fanless)
• Dimensions (W×D×H): 32 mm × 102 mm × 125.2 mm
• Mounting: DIN rail TS-35/7.5 or TS-35/15
• Safety standards: UL508 and TUV EN60950-1 certified
• Burn-in: 100% full load burn-in test performed
• Reliability: high MTBF (mean time between failures)

How to use

Install the unit on a compatible TS-35 DIN rail inside a properly ventilated enclosure. Connect the AC supply to the input terminals observing polarity and protective earth connection. Connect the 24V DC load to the output terminals, ensuring total load does not exceed the continuous 77W rating during normal operation; account for short-term peak capability when sizing for inrush currents. Verify installation against applicable electrical codes and the equipment's safety documentation before powering on.

Recommendations

Place the power supply where airflow is unobstructed to maintain convection cooling; avoid mounting next to heat sources. For stable operation, keep ambient temperature within the device's specified operating range and ensure connectors are tightened to recommended torque. Use appropriate fusing on the input and output circuits and follow local regulations for grounding and protective devices.