Power adapter/inverter MEAN WELL SPAN02A-03, 2 W output, 0.5 A output current, RoHS

MEAN WELL SPAN02A-03 is a compact DC-DC converter designed for low-power embedded electronics. The module accepts a wide input range and provides a regulated single 3.3 V DC output up to 0.5 A, delivering 2 W of output power in a SIP through-hole package suitable for PCB mounting. Compliance with RoHS indicates reduced hazardous substances in manufacturing, making it appropriate for projects where environmental standards are required.

Advantages

The SPAN02A-03 offers a small footprint and straightforward PCB integration thanks to its SIP through-hole form factor. Its wide input voltage range provides flexibility for use with different battery or supply rails between 9 and 18 V DC. The regulated 3.3 V output ensures stable voltage for sensitive microcontrollers, sensors, and communication modules while limiting power dissipation in space-constrained designs.

Suitable for

• Powering small embedded systems and microcontroller boards that require 3.3 V
• Sensor modules and low-power measurement instruments
• Industrial control modules with limited power budgets
• Battery-powered devices and prototypes operating from 9–18 V supplies

Key specifications

• Topology: DC-DC converter, PCB mount
• Input voltage range: 9–18 V DC
• Output: single 3.3 V DC
• Maximum output current: 0.5 A
• Output power: 2 W
• Package: SIP through-hole
• Compliance: RoHS

How to use

Install the module on a PCB using the SIP through-hole pins, ensuring correct orientation of input and output terminals. Supply an input voltage within the 9–18 V DC range and verify polarity before powering the board. Route adequate traces and ground connections to minimize noise and voltage drop. Add external decoupling capacitors on the input and output if required by your application to improve transient response and stability. Observe the device's current limit and thermal conditions during operation.

Recommendations

For reliable operation, avoid continuous operation at the maximum current in environments with limited airflow; provide sufficient PCB copper area for heat dissipation. Confirm compatibility with downstream circuitry requiring 3.3 V logic levels and protect sensitive inputs from transients using appropriate filtering or transient suppressors.