Power adapter/inverter Mean Well RSD-30H-3.3 — 30 W, input 40–160 V, output 3.3 V 6 A, RoHS, 60×113×25 mm

Mean Well RSD-30H-3.3 is a compact 30 W DC-DC enclosed converter designed to deliver a stable 3.3 V output at up to 6 A from a wide DC input range of 40–160 V. The unit meets railway standard EN50155 and provides 4000 VDC input-to-output isolation, making it suitable for industrial and embedded electronics that require reliable low-voltage power in constrained spaces. With RoHS compliance and a small footprint (60 × 113 × 25 mm), this power adapter/inverter fits DIN-rail or embedded installation scenarios where space efficiency and electrical safety are important.

Advantages

The RSD-30H-3.3 offers a wide input range that supports varying supply voltages while maintaining a regulated 3.3 V output at 6 A. Its 4000 VDC I/O isolation enhances safety and noise immunity between input and output circuits. Conformance to EN50155 and RoHS indicates suitability for rail applications and compliance with hazardous-substance limits. Its enclosed construction and compact dimensions enable straightforward mounting in industrial enclosures or on DIN rails without sacrificing power density.

Suitable for

• Embedded control systems requiring a stable 3.3 V rail
• Railway and mass transit electronics conforming to EN50155
• Industrial automation devices with wide DC supply ranges
• Telecommunications and network equipment needing isolated low-voltage power

Key specifications

• Output power: 30 W
• Input voltage range: 40–160 V DC
• Output voltage: 3.3 V DC
• Output current: up to 6 A
• Isolation: 4000 V DC input-to-output
• Standards: railway EN50155 compliance
• Compliance: RoHS
• Package dimensions: 60 × 113 × 25 mm

How to use

Install the converter according to the equipment manufacturer’s mounting guidelines, ensuring adequate ventilation and secure mechanical attachment for DIN-rail or panel mounting. Connect the DC input within the specified 40–160 V range and verify correct polarity before powering. Route output wiring to the 3.3 V load, observing current limits and proper connector termination to maintain reliable operation. Follow local safety rules and isolate power before making wiring changes.

Recommendations

To maximize reliability, keep ambient temperature and ventilation within the converter’s operating range, use proper fusing on the input side, and avoid exposing the unit to excessive vibration or moisture. For railway installations, follow EN50155 installation and testing practices and perform periodic inspections of connections and mounting integrity.