Technical Information & Details for the MEAN WELL MDR-40-5 Power Supply
- Output Power: 30 W
- Output Voltage: 5 V DC
- Output Current: 6 A
- Input Voltage Range: 85 – 264 V AC / 120 – 370 V DC, 47 – 63 Hz
- Efficiency: 78%
- Ripple & Noise: ≤ 80 mVp-p
- Inrush Current: Cold Start 30 A @ 115 VAC / 60 A @ 230 VAC
- No-load Power Consumption: < 0.75 W
- Operating Temperature: −20 °C to +70 °C
- Cooling: Free air convection (fanless)
- Protections: Short circuit, Overload (constant current limiting), Over voltage
- Special Features: DC OK relay contact, LED power indicator
- Isolation Voltage: 3000 V AC (I/P-O/P)
- Dimensions (W x H x D): 40 mm x 90 mm x 100 mm
- Weight: approx. 300 g
- Safety & EMC Certificates: UL508, UL62368-1, TUV, Class I Div 2 (HazLoc), CE, EAC
- Manufacturer Warranty: 3 Years
Information about the MEAN WELL MDR-40-5
The MEAN WELL MDR-40-5 represents a robust solution for ultra-compact DIN rail installations requiring high reliability and specialized signaling. This power supply distinguishes itself with a built-in DC OK relay contact, providing a hardware-based signal to PLCs or monitoring systems to confirm stable output voltage. Designed with a universal AC input range, it operates seamlessly across global power grids without the need for manual switching. One of its unique characteristics is the Class I, Division 2 hazardous location rating, making it a preferred choice for demanding environments like oil, gas, or chemical processing plants where safety is paramount. Furthermore, the unit's constant current limiting protection type ensures that the system remains operational even under heavy startup loads, recovering automatically once the fault is cleared. With a focus on sustainability, the device maintains a no-load power consumption of under 0.75W, effectively reducing standby energy costs while the narrow 40mm width maximizes valuable rail space in crowded control cabinets.