• Output Power: 398.4 W
• Output Voltage: 48 V DC
• Output Current: 0 – 8.3 A
• Input Voltage Range: 90 – 264 V AC / 127 – 370 V DC, 47 – 63 Hz
• Efficiency: up to 90 %
• Ripple & Noise: ≤ 240 mVp-p
• Inrush Current: max. 45 A @115 VAC / 90 A @230 VAC
• PFC Function: Built-in active PFC (PF ≥ 0.95)
• Operating Temperature: −30 °C to +60 °C
• Cooling: Free air convection
• Protection Functions: Short circuit, Overload, Over voltage, Over temperature
• Withstand Surge: 300 VAC surge input for 5 seconds
• Isolation Voltage: 3000 V AC between input and output
• Dimensions (L x W x H): 220.4 mm x 130 mm x 48 mm
• Weight: 1.1 kg
• Safety & EMC Certificates: UL60950-1, EN62368-1, CB, CE, EAC, CCC
• LED Indicator: Power On Indicator
• Manufacturer Warranty: 3 Years

Information about the MEAN WELL ERPF-400-48

The MEAN WELL ERPF-400-48 is a high-voltage 400W single-output power supply engineered for superior durability in challenging outdoor environments. Its defining characteristic is the semi-potted interior housed within a rugged aluminum casing, providing a specialized rain splash and dust protection mechanism. This makes the unit exceptionally well-suited for outdoor LED signage, channel letters, and commercial displays where moisture and debris are common operational hazards. By relying on free air convection cooling, the ERPF-400-48 eliminates the need for mechanical fans, thereby increasing overall system reliability and minimizing long-term maintenance costs.

Equipped with a built-in active PFC function, this power supply achieves a typical efficiency of 90% and ensures stable operation even under fluctuating power conditions. It is built to be remarkably resilient, featuring the ability to withstand 300VAC surge inputs for up to five seconds, which safeguards connected equipment from voltage spikes. The ERPF-400-48 includes a comprehensive protection package covering short circuits, overloads, over-voltage, and over-temperature, all verified through a 100% full load burn-in test. Combined with a 3-year manufacturer warranty, it stands as a reliable, low-profile, and cost-effective power solution for high-voltage industrial and decorative applications.