DC power adapter MEAN WELL DCWN03E-05 3W 5V 0.3A RoHS

The MEAN WELL DCWN03E-05 is a compact DC power adapter delivering 3W output power with a regulated 5V DC output at 0.3A. It features a DC-DC regulated dual-output converter topology with input range 4.5–9V DC and provides ±5V outputs at ±0.3A with 3000VDC input-to-output isolation in a DIP through-hole package. The unit is RoHS compliant and suitable for integration into small electronic devices and applications requiring isolated dual rails.

Advantages

This module offers regulated dual outputs with high input-to-output isolation (3000VDC), compact DIP through-hole packaging for straightforward PCB mounting, and a wide input voltage range (4.5–9V DC) that supports battery or regulated DC sources. The product meets RoHS environmental standards.

Suitable for

• Small embedded systems and microcontroller projects
• Signal conditioning and sensor interfaces requiring isolated rails
• Portable devices powered from 5–9V DC sources
• Applications needing low-power ±5V supplies

Key specifications

• Manufacturer: MEAN WELL
• Model / MPN: DCWN03E-05
• Output power: 3W
• Output voltage / current: ±5V at ±0.3A (single output 5V @ 0.3A per summary)
• Input voltage range: 4.5–9V DC
• Isolation: 3000VDC input-to-output
• Package: DIP through-hole
• Compliance: RoHS

How to use

Mount the DCWN03E-05 in a compatible DIP footprint on the PCB and solder the pins for mechanical and electrical connection. Apply a DC input voltage within the specified 4.5–9V range to the input pins. Observe correct polarity. Use the ±5V output rails to power target circuits, staying within the 0.3A per rail current limit. Provide adequate clearance and grounding on the PCB according to your system requirements.

Recommendations

Use proper decoupling capacitors on the input and output as recommended in your system design, avoid exceeding the rated current, and maintain creepage/clearance distances to preserve the 3000V isolation rating.