• Output Power: 400.8 W
• Output Voltage: 12 V DC
• Output Current: 33.4 A
• Input Voltage Range: 90 – 264 V AC / 127 – 370 V DC, 47 – 63 Hz
• Efficiency: up to 89 %
• Ripple & Noise: ≤ 150 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-400-12

The MEAN WELL ERPF-400-12 is a high-performance, 400W single-output power supply engineered for industrial reliability and outdoor durability. Its most striking feature is the semi-potted interior combined with a robust aluminum enclosure, providing a specialized design against rain splash and dust. This makes it an exceptional choice for demanding environments like LED signage, channel letters, and commercial outdoor displays where protection against the elements is non-negotiable. By utilizing free air convection cooling, the unit operates silently and efficiently without the mechanical failure risks associated with internal fans, while the active PFC function ensures compliance with harmonic current regulations and optimizes overall power quality.

Beyond its rugged physical build, the ERPF-400-12 offers superior electrical stability and comprehensive protection mechanisms, including short circuit, overload, and over-temperature safeguards. It is remarkably resilient, capable of withstanding 300VAC surge inputs for up to five seconds, which protects sensitive electronics from unpredictable grid fluctuations. The low-profile 48mm design allows for easy integration into slim cabinets, while the 100% full load burn-in test and 3-year warranty guarantee long-term operational security. Whether powering large-scale LED decorations or industrial machinery, this power supply delivers a perfect balance of cost-effectiveness and high-tier reliability for any modern infrastructure project.