DC/DC converter mean well DCWN03A-15, 3 W, input 9–18 V, output 100 mA, 20.3×31.8×10.2 mm

Mean Well DCWN03A-15 is a compact 3 W DC/DC converter designed for applications that require a reliable isolated supply in a small form factor. With an input range of 9–18 V and a fixed output current of 100 mA, this module provides stable voltage conversion and galvanic isolation suitable for embedded electronics, sensors and communication modules. Its footprint of 20.3 × 31.8 × 10.2 mm allows integration in space-constrained designs and industrial control circuits where board space and thermal management are limited.

Advantages

The converter combines a low-profile package with isolation between input and output, offering safety and noise reduction in mixed-signal environments. Low power rating and fixed output current make the device predictable and easy to integrate without complex regulation. The compact dimensions and standardized pin layout simplify PCB mounting and mechanical placement in compact enclosures.

Suitable for

• Isolated power supply for sensors and transducers
• Powering communication modules and radio interfaces
• Embedded systems and microcontroller peripherals
• Industrial control circuits requiring galvanic isolation
• Battery-powered or space-limited designs with 9–18 V inputs

Key specifications

• Output power: 3 W
• Input voltage range: 9–18 V DC
• Output current: fixed 100 mA
• Isolation: isolated input to output (galvanic isolation)
• Package dimensions: 20.3 × 31.8 × 10.2 mm
• Low-profile, PCB-mountable module

How to use

Install the module on a PCB according to the manufacturer’s recommended footprint and ensure correct input polarity before applying power. Connect the input to a stable 9–18 V DC source and route the isolated output to the target circuit requiring a 100 mA supply. Provide adequate creepage and clearance on the PCB around the module to maintain isolation performance. Consider mounting location for heat dissipation; although power is low, allow some airflow or thermal path to the board if the ambient temperature is high.

Recommendations

Verify the converter’s input voltage and output current requirements against the target application. Implement input filtering and transient protection if the source is noisy or subject to spikes. When using in industrial environments, follow recommended layout practices for isolation and grounding to minimize noise coupling and ensure reliable operation.