Power Supply Unit MEAN WELL NDR-75-48

The MEAN WELL NDR-75-48 is a compact DIN-rail mounted power supply delivering 76.8 W with an input range of 90–264 VAC (47–63 Hz). Designed for industrial control applications, it features passive (free air convection) cooling, multiple protection functions and approvals including UL 508 and TUV EN60950-1/EN60204-1. With a reported MTBF of 486,200 hours and a 3-year warranty, the unit is suitable for reliable long-term operation in control cabinets and automation systems.

Advantages

The power supply provides universal AC input for flexible installation and several built-in protections: short circuit, overload, over voltage and over temperature. Its passive cooling eliminates the need for fans, reducing maintenance and noise. The compact form factor fits on a TS-35/7.5 or 15 DIN rail and the device has undergone a 100% full-load burn-in test to ensure consistent performance.

Suitable for

• Industrial control panels and automation systems
• DIN-rail installations in distribution cabinets
• Powering PLCs, sensors and relay modules requiring 48 V
• Applications requiring UL 508 approval and industrial EMI immunity

Key specifications

• Model: MEAN WELL NDR-75-48 (MPN: NDR-75-48)
• Output power: 76.8 W
• Input voltage: 90–264 VAC, 47–63 Hz
• Cooling: Passive (free air convection)
• Protections: Short circuit, overload, over voltage, over temperature
• Approvals: UL 508, TUV EN60950-1; meets EN60204-1 and EN61000-6-2 (industrial immunity)
• Mounting: DIN rail TS-35/7.5 or 15
• Dimensions (W×D×H): 32 × 102 × 125.2 mm
• MTBF: 486,200 hours
• Warranty: 3 years

How to use

Mount the unit on a TS-35/7.5 or 15 DIN rail inside an appropriate enclosure. Connect the AC mains (90–264 VAC) to the input terminals and connect the 48 V DC output to your load, observing correct polarity and wiring standards. Ensure adequate clearance for free air convection cooling and follow local electrical codes. Verify output voltage under load and confirm that protective devices and wiring are rated for the connected equipment.

Recommendations

Install the power supply in a dry, dust-free environment with sufficient airflow. Avoid covering ventilation areas and keep the ambient temperature within the manufacturer’s specified range. Regularly inspect terminal connections and ensure protection against overloads and short circuits at the system level.