Power adapter Mean Well MPM-45-48ST 45 W, indoor, input 80–264 V, output 48 V, black

MPM-45-48ST is a compact 45 W indoor AC/DC PCB-mount medical-grade power adapter with universal input voltage 80–264 VAC and a regulated 48 V output. The unit meets medical safety standards (EN/UL 60601) with 2×MOPP isolation and low leakage current, and is RoHS compliant. Its small footprint and high efficiency make it suitable for professional and industrial devices that require a stable 48 V supply.

Advantages

The adapter delivers high efficiency (up to 92.5%) and very low no-load power consumption (<0.1 W). It provides reinforced insulation equivalent to Class II (2×MOPP), high EMC performance, 4 kVAC isolation and robust anti-vibration characteristics (2–5 G depending on model). The compact dimensions and effective thermal dissipation simplify integration into space-constrained designs.

Suitable for

• Medical equipment and diagnostic devices requiring 2×MOPP isolation
• Professional and industrial electronics needing a stable 48 V supply
• PCB-mounted power solutions in compact assemblies

Key specifications

• Output power: 45 W
• Input voltage: 80–264 VAC
• Output voltage: 48 V
• Isolation: 4 kVAC; safety: EN/UL 60601 compliant, 2×MOPP
• Efficiency: up to 92.5%
• No-load power consumption: <0.1 W
• Dimensions (manufacturer summary): 52 × 109 × 33.5 mm
• Finish: black; RoHS compliant

How to use

Mount the MPM-45-48ST on the PCB according to the manufacturer’s layout and soldering guidelines, and connect the AC input (80–264 VAC) and the regulated 48 V output to the target circuitry. Ensure correct creepage and clearance distances in your assembly to maintain the certified 2×MOPP isolation. Provide adequate ventilation or heatsinking as required by your application to maintain operating temperature within specified limits.

Recommendations

Use the adapter in indoor environments and install it in equipment designed to meet medical safety and EMC requirements. Verify that the output rating and isolation level match the device’s needs and follow service and grounding practices specified in EN/UL 60601 when integrating into medical systems.