Power adapter/inverter MEAN WELL RSD-30L-12, 30 W, 18–72 V input, 12 V output, RoHS

MEAN WELL RSD-30L-12 is a compact, enclosed DC-DC converter that converts a wide input range of 18–72 V DC to a regulated 12 V DC output at up to 2.5 A. Designed for demanding environments, this 30 W module provides high isolation between input and output and complies with railway standard EN50155 while meeting RoHS environmental requirements. Its small footprint (60 × 113 × 25 mm) makes it suitable where space is limited and reliable 12 V power is required.

Advantages

The converter delivers a stable 12 V output with 30 W continuous power in a compact metal enclosure, featuring 4000 V DC isolation between input and output for enhanced safety and noise immunity. Wide input flexibility (18–72 V DC) allows operation across various vehicle, industrial, and telecom power systems. Compliance with EN50155 and RoHS indicates suitability for railway-related applications and adherence to environmental restrictions. Its compact dimensions and enclosed design support secure mounting and protection against mechanical stress.

Suitable for (tasks / use cases)

• Automotive and commercial vehicle 12 V subsystems
• Railway and rolling stock power supplies compliant with EN50155
• Industrial control equipment requiring isolated 12 V rails
• Telecom and network devices in wide-voltage installations

Key specifications

• Output power: 30 W
• Input voltage range: 18–72 V DC
• Output voltage: 12 V DC
• Output current: up to 2.5 A
• Isolation: 4000 V DC input-to-output
• Standards: meets railway EN50155
• Enclosure type: enclosed DC-DC converter
• Dimensions: 60 × 113 × 25 mm
• Compliance: RoHS

How to use

Mount the enclosed converter in a location with adequate airflow and secure it using the recommended mounting points. Connect the DC input to a suitable 18–72 V source, observing correct polarity and ensuring the source can supply required startup and running currents. Connect the 12 V output to the load, respecting the maximum 2.5 A current rating. Ensure wiring and connectors are rated for the voltages and currents in the installation and provide proper fusing on the input side as required by local regulations or system design. Verify system grounding and isolation before applying power.

Usage recommendations

For reliable operation, avoid placing the converter near heat sources or in confined spaces with insufficient ventilation. Use short, well-sized wiring to minimize voltage drop at higher currents, and include input-side surge protection when used in vehicle or railway environments. Observe the device’s isolation rating when integrating it into systems with mixed voltage domains.