Technical Information & Details for the MEAN WELL WDR-120-48 Power Supply
- Output Power: 120 W
- Output Voltage: 48 V DC
- Output Current: 2.5 A
- Input Voltage Range: 180 – 550 V AC / 254 – 780 V DC, 47 – 63 Hz
- Efficiency: 92 % / 400 V
- Ripple & Noise: ≤ 150 mVp-p
- Inrush Current: max. 50 A (Cold Start)
- Operating Temperature: -25 °C to +70 °C
- Cooling: free air convection
- Protection Functions: Short circuit, Overload, Over voltage, Over temperature
- Isolation Voltage: I/P-O/P: 3KVAC, I/P-FG: 2KVAC, O/P-FG: 0.5KVAC
- Dimensions (H x B x T): 125.2 mm x 40 mm x 113.5 mm
- Weight: 0.65 kg
- Safety Standards: UL508, IEC62368-1, EAC TP TC 004
- DC OK Signal: Relay contact rating 30V/1A resistive
- Manufacturer Warranty: 3 years
Information about the MEAN WELL WDR-120-48
The MEAN WELL WDR-120-48 stands out as a high-efficiency solution for industrial power needs, delivering a stable 48V DC output at 2.5A. Its most defining characteristic is the ultra-wide input range of 180 to 550V AC, which allows it to operate seamlessly on single-phase or two-phase electrical systems. This flexibility is a major strength for global industrial applications where varying grid voltages are common, or where a neutral wire may not be present. By achieving a 92% efficiency rating, this model minimizes internal heat generation, allowing for reliable operation via free air convection without the need for noisy or maintenance-prone fans.
Beyond its power conversion capabilities, the WDR-120-48 is built for rigorous professional monitoring and safety. It features an integrated DC OK relay contact, providing a simple yet effective way to verify the output status remotely within automated systems. The unit is protected by a built-in constant current limiting circuit and advanced safeguards against short circuits, overloads, and thermal spikes. Its slim 40mm design ensures it occupies minimal space on a DIN rail TS-35/7.5 or 15, making it ideal for high-density control cabinets. With a 3-year manufacturer warranty and compliance with UL508 standards, it is a robust and dependable choice for telecommunications, high-voltage industrial machinery, and critical automation infrastructure.
