• Output Power: 400 W max.
• Output Voltage: 48 V DC (Adjustable 45.6 – 50.4 V)
• Output Current: 8.3 A
• Input Voltage Range: 90 – 264 V AC / 127 – 370 V DC, 47 – 63 Hz
• Efficiency: Up to 88.5%
• Ripple & Noise: ≤ 360 mVp-p
• Inrush Current: Max. 40 A @ 230 VAC / 25 A @ 115 VAC
• Operating Temperature: −30 °C to +70 °C
• Cooling: Fanless (Free air convection / optional 450x450x3 mm cooling plate)
• Protections: Overload, Over voltage, Over temperature
• Isolation Voltage: 4000 V AC (I/P-O/P), 2000 V AC (I/P-FG), 1500 V AC (O/P-FG)
• Dimensions (L x W x H): 250 mm x 89 mm x 37 mm
• Weight: Approx. 0.88 kg
• Safety & EMC Certificates: EAC, UL62368-1, DEKRA BS EN/EN62368-1; Design refer to ANSI/AAMI ES60601-1 / EN60601-1 (2xMOPP)
• Manufacturer Warranty: 3 Years

Information About the MEAN WELL UMP-400-48

The MEAN WELL UMP-400-48 is an advanced, fanless 400 Watt power supply engineered for noise-sensitive, high-reliability industrial and medical applications. It provides a primary output voltage of 48 Volts DC with a rated output current of 8.3 Amps and an adjustable voltage range of 45.6 to 50.4 Volts. Featuring a low-profile 1U enclosure measuring 250 x 89 x 37 mm, it integrates easily into space-constrained system designs.

Designed with a highly flexible modular architecture, the UMP-400-48 can operate as a standalone single-output supply or be configured with optional NID DC modules to deliver up to four independent output channels. Its completely fanless conduction/convection cooling eliminates mechanical noise and fan maintenance issues, while continuous full load can be achieved using an optional aluminum cooling plate. Certified to IEC/EN/UL62368-1 for ITE applications and designed to meet 2xMOPP medical isolation requirements (ANSI/AAMI ES60601-1), this power supply offers top-tier safety backed by a 3-year manufacturer warranty.