Technical Information & Details for the MEAN WELL WDR-120-24 Power Supply
- Output Power: 120 W
- Output Voltage: 24 V DC
- Output Current: 5 A
- Input Voltage Range: 180 – 550 V AC / 254 – 780 V DC, 47 – 63 Hz
- Efficiency: up to 91 %
- Ripple & Noise: ≤ 120 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: 3000 V AC between input and output
- Dimensions (H x B x T): 125.2 mm x 40 mm x 113.5 mm
- Weight: approx. 650 g
- Safety & EMC Certificates: UL508, IEC62368-1, EAC, BS EN/EN61000-6-2
- DC OK Signal: Relay contact rating 30V/1A resistive
- Manufacturer Warranty: 3 years
Information about the MEAN WELL WDR-120-24
The MEAN WELL WDR-120-24 is a specialized industrial power supply designed to provide a stable 24V DC output at 5A, specifically engineered for environments with high-voltage supply lines. Its primary strength lies in the ultra-wide input range, which allows the unit to operate reliably on either single-phase or two-phase electrical systems between 180 and 550V AC. This versatility is critical for industrial applications where a neutral wire may not be available or where voltage stability is inconsistent. With a peak efficiency of 91%, the WDR-120-24 minimizes thermal loss, allowing it to function effectively using only natural air convection within its compact 40mm wide chassis.
Safety and system monitoring are heavily prioritized in this model, featuring a built-in DC OK relay contact that provides an automated signal for remote status tracking. The unit is equipped with advanced constant current limiting circuits and a robust protection suite that handles overloads, overvoltage, and thermal spikes with automatic recovery. Meeting heavy industrial immunity levels and UL508 standards, this power supply is an ideal choice for industrial control systems, semiconductor fabrication, and factory automation. The rugged design ensures a long service life, backed by a 3-year manufacturer warranty and a high MTBF, making it a dependable component for critical 24V infrastructure.