• Output Power: 302.4 W with Fan / 183.6 W Convection
• Output Voltage: 27 V DC (adjustable 25.7 – 28.4 V)
• Output Current: 11.2 A with Fan / 6.8 A Convection
• Input Voltage Range: 80 – 264 V AC / 113 – 370 V DC, 47 – 63 Hz
• Efficiency: 94 %
• Ripple & Noise: 150 mVp-p
• Inrush Current: 40 A @115 VAC / 80 A @230 VAC
• No-load Power Consumption: < 0.5 W
• Operating Temperature: −40 °C to +80 °C
• Cooling: Free air convection or forced-air (10.98 CFM)
• Protections: Short circuit, Overload, Over voltage, Over temperature
• Over Voltage Category: OVC III
• Isolation Voltage: 4 kV AC (Input to Output)
• Dimensions (L x W x H): 101.6 mm x 50.8 mm x 25.4 mm
• Weight: 0.21 kg
• Safety & EMC Certificates: CB, UL, TUV, EAC, CE (62368-1, 60601-1, 60335-1, 61558-1)
• LED Indicator: Power On indicator
• Manufacturer Warranty: 3 Years

Information about the MEAN WELL LOP-300-27

The MEAN WELL LOP-300-27 is a high-performance 300W open frame power supply designed for applications where space and reliability are paramount. Featuring a compact 4" x 2" footprint and an ultra-low 1-inch (25.4mm) profile, it achieves a superior power density of 37.5 W/in³. This unit is exceptionally versatile, holding global multi-field certifications for Medical (2xMOPP), ITE, and Household standards. Its Over Voltage Category III (OVC III) compliance and 5000-meter altitude rating make it a robust choice for primary-side industrial installations and high-altitude deployments worldwide.

Engineered for excellence, the LOP-300-27 boasts a peak efficiency of 94% and a wide operating temperature range from -40 °C to +80 °C. It is designed to handle 150% peak loads for up to 3 seconds, providing critical headroom for devices with high startup currents. While delivering 183.6W under silent natural convection, it can reach its full 302.4W output with forced-air cooling, supported by a dedicated 12V/0.5A auxiliary fan output. Additionally, its touch leakage current of less than 70 µA ensures full suitability for BF-rated medical equipment, offering a safe and efficient energy solution for advanced healthcare and automation systems.