Power adapter/inverter Mean Well RSD-30H-12 — 30 W, 12 V output, 40–160 V input

Mean Well RSD-30H-12 is a compact DC-DC enclosed converter delivering 30 W of regulated power with a fixed 12 V DC output. Designed for use where input voltage varies widely, it accepts 40–160 V DC and provides a stable 12 V/2.5 A supply. The unit conforms to railway standard EN50155, offers high isolation between input and output, and fits industrial and mobile applications that require a small, robust power module with reliable performance.

Advantages

The converter provides a wide input range that enables direct connection to variable DC sources such as battery strings or intermediate DC rails. With 30 W output and 12 V regulation it supports common control and instrumentation loads without external trimming. High isolation voltage between input and output and compliance with EN50155 ensure safe operation in demanding environments. The compact enclosed package measuring 60 × 113 × 25 mm simplifies installation in space-constrained equipment.

Suitable for

• Railway and rolling-stock electronic systems requiring EN50155 compliance
• Telecommunication equipment and remote radio units
• Industrial control systems and PLC peripherals
• Battery-fed devices and mobile power applications
• Instrumentation and sensor modules needing a stable 12 V rail

Key specifications

• Output power: 30 W
• Output voltage: 12 V DC
• Maximum output current: 2.5 A
• Input voltage range: 40–160 V DC
• Isolation: 4000 V DC input-to-output isolation
• Standards: designed to meet EN50155 for railway applications
• Enclosure: compact enclosed housing, dimensions 60 × 113 × 25 mm

How to use

Install the converter in a location that provides adequate ventilation and where ambient temperature stays within the device’s rated range. Connect the DC input to a suitable 40–160 V source, observing correct polarity. Connect the 12 V DC output to the load, ensuring the combined current draw does not exceed 2.5 A. Securely fasten the unit in place and follow any grounding or mounting instructions from the equipment designer. For applications in railway or industrial environments, confirm compatibility with system-level protections such as fuses and surge suppressors.