Power adapter/inverter MEAN WELL SPU01N-05, Input 21.6–26.4 V, Output 5 V, Output power 1 W

MEAN WELL SPU01N-05 is a compact DC-DC converter for PCB mounting that converts an input of 21.6–26.4 V DC to a regulated 5 V DC output with up to 0.2 A (1 W) output power. Packaged in a SIP through-hole format, the module is intended for low-power embedded electronics, auxiliary circuits and sensor applications where a small, RoHS-compliant 5 V supply is required. The design focuses on stable voltage regulation in constrained spaces and easy board-level integration.

Advantages

The module provides a stable regulated 5 V output from a relatively wide input range optimized for single-battery or intermediate bus voltages. Its SIP through-hole package simplifies PCB mounting and mechanical retention while keeping the footprint small. Low output power and efficient conversion make it suitable for always-on or standby circuits, and RoHS compliance supports use in electronics that require restricted-substance conformity.

Suitable for

• Embedded microcontroller power supply in low-power devices
• Powering small sensors and data-acquisition modules
• Auxiliary circuitry and logic rails in industrial or automotive electronics (within specified input range)
• Backup or standby 5 V supply for monitoring systems

Key specifications

• Input voltage range: 21.6–26.4 V DC
• Output voltage: 5 V DC regulated
• Maximum output current: 0.2 A (1 W output power)
• Mounting style: SIP through-hole (PCB mount)
• Application class: DC-DC converter for low-power circuits and sensors
• Compliance: RoHS

How to use

Solder the SIP pins into the PCB according to the module pinout and maintain recommended clearances for thermal dissipation. Apply an input voltage within 21.6–26.4 V DC and verify correct polarity before powering. Measure the output under load to ensure the module provides a stable 5 V at the expected current. Follow the board layout guidance from the manufacturer to minimize noise and ensure reliable grounding.

Recommendations

Operate the converter within the specified input range and below its maximum output current to ensure longevity. Provide adequate copper area or thermal vias on the PCB for heat dissipation when used near the 1 W limit, and add input/output decoupling capacitors close to the pins if the application is sensitive to switching noise.