The Hi-Link HLK-PM01 5V/3W AC-DC Power Supply Module is a compact, isolated switching power supply designed to convert 90–264V AC mains input into a stable 5V DC output. With a 3W power rating, it is suitable for powering microcontrollers, sensors, IoT devices, relay modules, automation systems, and other low-power electronics. It features overload and short-circuit protection, low ripple, high efficiency, low power consumption, and natural cooling. Its compact PCB-mountable design makes it ideal for embedded and DIY electronics projects.