MEAN WELL SD-500L-24 Electrical Converter

The MEAN WELL SD-500L-24 is an electric converter providing 504 W output in a compact metal housing (97 mm × 159 mm × 38 mm). It accepts a wide DC input voltage from 19 to 72 V and supplies a regulated 24 V output with a maximum output current of 21 000 mA. The unit includes DC input active surge current limiting and 2000 VAC input/output isolation for enhanced safety in industrial and mobile applications.

Advantages

The converter features forced-air cooling via a built-in DC fan with fan speed control to optimise thermal performance and reduce noise when load conditions permit. It offers an Output OK signal, built-in remote ON-OFF control and remote sense function to maintain stable voltage at the load. The compact footprint and full protection features make it suitable for systems with limited space.

Suitable for

• Industrial control equipment and automation
• Telecom and network devices requiring 24 V supply
• Mobile and vehicle power systems with 19–72 V DC sources
• Laboratory benches and test rigs needing stable 24 V, 21 A output

Key specifications

• Model: MEAN WELL SD-500L-24 (MPN: SD-500L-24, EAN: 4021087001977)
• Output power: 504 W
• Input voltage: DC 19–72 V
• Output voltage/current: 24 V / 21 000 mA (21 A)
• Isolation: 2000 VAC I/O isolation
• Cooling: Forced air cooling by built-in DC fan with fan speed control
• Protections/interface: DC input active surge current limiting, Output OK signal, remote ON-OFF control, remote sense
• Dimensions (W×D×H): 97 × 159 × 38 mm

How to use

Install the converter on a stable surface with adequate ventilation so the built-in fan can provide airflow. Connect the DC input (19–72 V) observing correct polarity and secure wiring. Use the remote sense terminals to compensate for voltage drop at the load if required. Configure the remote ON-OFF control and monitor the Output OK signal as part of system monitoring. Follow manufacturer wiring diagrams and safety instructions when integrating into equipment.

Recommendations

Use appropriate fusing on the DC input and ensure adequate airflow around the unit. For long cable runs, use the remote sense feature to maintain correct load voltage. Avoid environments with excessive dust or corrosive gases unless the installation provides environmental protection.