Discontinued Product see replacement: NDR-75

Technical Specifications & Details for MEAN WELL MDR-20-12 Power Supply Output Power: 20 W Output Voltage: 12 V DC Output Current: 1.67 A Input Voltage Range: 85 – 264 V AC / 120 – 370 V DC, 47 – 63 Hz Efficiency: 80% Ripple & Noise: ≤ 120 mVp-p Inrush Current: max. 20 A @115 VAC / 40 A @230 VAC No-load Power Consumption: < 0.75 W Operating Temperature: −20 °C to +70 °C Cooling: Free air convection Protections: Short circuit, Overload, Over voltage Isolation Voltage: 3000 V AC I/P to O/P Dimensions (W x H x D): 22.5 mm x 90 mm x 100 mm Weight: approx. 170 g Safety & EMC Certificates: UL 508, TUV EN62368-1, EAC, CB, BSMI, IS13252 LED Indicator: Power On LED indicator Manufacturer Warranty: 3 Years Information on the MEAN WELL MDR-20-12 The MEAN WELL MDR-20-12 represents a benchmark in industrial power engineering, offering a stable 12V output within an ultra-compact 22.5mm chassis. This slim profile is specifically designed to optimize rail space on TS-35/7.5 or 15 DIN rails, making it indispensable for high-density control cabinet installations. A defining characteristic of the MDR series is the built-in DC OK active signal, which provides a hardware-based status output for remote monitoring, significantly reducing downtime in complex automation setups. Furthermore, the unit is optimized for minimal energy waste, boasting a no-load power consumption of less than 0.75W, which meets the highest standards for eco-friendly operation. Safety is paramount, featuring a constant current limiting protection that allows for safe handling of peak loads and ensures automatic recovery once a fault is cleared. With its fanless convection cooling design and a wide operating temperature range, the MDR-20-12 ensures long-term reliability for PLC interfaces, IT equipment, and industrial sensory networks.

Technical Information & Details for the MEAN WELL MDR-40-24 Power Supply Output Power: 40.8 W Output Voltage: 24 V DC Output Current: 1.7 A Input Voltage Range: 85 – 264 V AC / 120 – 370 V DC, 47 – 63 Hz Efficiency: 88% Ripple & Noise: ≤ 150 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 status indicator, Adjustable output voltage Isolation Voltage: 3000 V AC (I/P-O/P) Dimensions (W x H x D): 40 mm x 90 mm x 100 mm Weight: 0.3 kg Safety & EMC Certificates: UL508, UL62368-1, TUV, Class I Div 2 (HazLoc), CE, EAC Manufacturer Warranty: 3 Years Information about the MEAN WELL MDR-40-24 The MEAN WELL MDR-40-24 is a robust 40.8W industrial DIN rail power supply engineered for precision automation and critical control systems. A key differentiator for this unit is the integrated DC OK relay contact, which provides a hardware-level signal for remote monitoring of the power state, ensuring system integrity and facilitating rapid troubleshooting. The device utilizes constant current limiting for overload protection, which allows for stable operation even with temporary peak loads and ensures automatic recovery once fault conditions are cleared. Specifically designed for demanding environments, it holds Class I, Division 2 hazardous location certification, making it suitable for chemical, oil, and gas applications. With a focus on energy conservation, the MDR-40-24 boasts a no-load power consumption of under 0.75W and high 88% efficiency. Its ultra-slim 40mm design maximizes rail space, while the universal wide-range input and 100% full load burn-in testing guarantee global compatibility and long-term durability in professional setups.

Technical Specifications & Details for MEAN WELL MDR-20-24 Power Supply Output Power: 24 W Output Voltage: 24 V DC Output Current: 1 A Input Voltage Range: 85 – 264 V AC / 120 – 370 V DC, 47 – 63 Hz Efficiency: 84% Ripple & Noise: ≤ 150 mVp-p Inrush Current: max. 20 A @115 VAC / 40 A @230 VAC No-load Power Consumption: < 0.75 W Operating Temperature: −20 °C to +70 °C Cooling: Free air convection Protections: Short circuit, Overload (Constant current limiting), Over voltage Isolation Voltage: 3000 V AC I/P to O/P Dimensions (W x H x D): 22.5 mm x 90 mm x 100 mm Weight: approx. 170 g Safety & EMC Certificates: UL 508, TUV BS EN/EN62368-1, EAC, CB, BSMI, IS13252 LED Indicator: Power On LED indicator Manufacturer Warranty: 3 Years  Information on the MEAN WELL MDR-20-24 The MEAN WELL MDR-20-24 is a highly reliable 24W power supply designed for seamless DIN rail integration in space-constrained industrial environments. Its ultra-slim 22.5mm width allows for maximum component density on TS-35/7.5 or 15 rails, making it a preferred choice for modern control panels. A key technical advantage of this model is the built-in DC OK active signal, which provides real-time feedback on the output status to higher-level monitoring systems or PLCs. Engineered for superior energy performance, it achieves an efficiency of 84% and maintains a no-load power consumption of less than 0.75W, significantly lowering the total cost of ownership and thermal dissipation. The unit employs a constant current limiting protection strategy, ensuring it remains robust during startup surges or temporary overloads and recovers automatically once conditions stabilize. With its maintenance-free fanless design and a full suite of global safety approvals, the MDR-20-24 provides a stable 24V DC foundation for automation, telecommunications, and building management systems.