Mean Well LOP-400-24 400W 5"×3" Low Profile Open Frame Power Supply 24V

The LOP-400-24 is a 400W open frame AC-DC power supply with a 24V DC output. It is rated for 10.5A output current and accepts a wide 80 to 264VAC input range. The unit also supports 113 to 370VDC input.

This model uses a compact 5 x 3 inch footprint and a low-profile 27.5mm height. Its dimensions are 127 x 76.2 x 27.5mm, which helps when enclosure space is limited. That combination is a key differentiator for compact industrial, ITE, and medical designs.

This model includes medical-related approvals under IEC60601-1 and is described as suitable for BF medical applications due to its extremely low leakage current and 2 x MOPP design. It also carries certifications across ITE, household, and industrial standards. Buyers should still confirm the full end-equipment compliance requirements for their specific device.

The LOP-400-24 delivers 250W under convection cooling and reaches 400W when used with 23CFM forced-air cooling. That means full rated output depends on adequate airflow. It also includes a built-in 12V/0.5A output for an external fan.

This power supply includes short circuit, overload, overvoltage, and overtemperature protection. Its overload range is 105 to 150 percent of rated output power, with hiccup protection after 3 seconds and automatic recovery after the fault is removed. Overvoltage and overtemperature protection shut down output and recover after conditions return to normal or after re-powering, depending on the fault type.

The unit is rated for operation from -40C to +80C, subject to the manufacturer's derating guidance. It is also specified for operating altitudes up to 5000 meters and supports overvoltage category III installations. These specs make it suitable for demanding commercial and industrial environments.