• Output Power: 400.8 W (with 23CFM Fan) / 250.2 W (Convection)
• Output Voltage: 18 V DC
• Output Current: 22.2 A (with 23CFM Fan) / 13.9 A (Convection)
• Input Voltage Range: 80 – 264 V AC / 113 – 370 V DC, 47 – 63 Hz
• Efficiency: up to 94%
• Ripple & Noise: 180 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-cooled with external fan
• Protection Functions: Short circuit, Overload, Over voltage, Over temperature
• Over Voltage Category: OVC III
• Isolation Voltage: 4000 V AC between Input and Output
• Dimensions (L x W x H): 127 mm x 76.2 mm x 27.5 mm
• Weight: 0.39 Kg
• Safety & EMC Certificates: CB, TUV, UL, CCC, RCM, EAC, CE
• LED Indicator: Power On Indicator
• Manufacturer Warranty: 3 Years

Information about the MEAN WELL LOP-400-18

The MEAN WELL LOP-400-18 is a high-efficiency 400W low-profile open frame power supply that delivers an impressive power density of 24.6W/in³. Designed with a compact 5" x 3" footprint and an ultra-slim height of 27.5mm, this unit is the perfect solution for modern electronic designs where vertical space is severely limited. It is uniquely engineered to support both Class I and Class II system configurations, providing designers with maximum flexibility. With its universal 80-264VAC input and Over Voltage Category III (OVC III) rating, it ensures robust performance and safety when connected directly to the main electrical grid in industrial or building automation settings.

Beyond its physical dimensions, the LOP-400-18 excels in specialized safety environments, carrying comprehensive certifications for Medical (2xMOPP), Industrial, and Household applications. Its extremely low leakage current of less than 70µA makes it a primary choice for BF-rated medical equipment. The device manages thermal loads intelligently, offering 250.2W via natural convection and scaling up to its full 400.8W capacity with forced-air cooling. Equipped with a 150% peak load capacity for 3 seconds and a built-in 12V auxiliary fan output, it provides the reliability and surge capability required for high-performance security systems and sophisticated telecommunication hardware.