Ensure stable and reliable power supply for your electronic circuits with the compact HLK-PM01 unit. Specifically designed for direct integration onto printed circuit boards (PCBs), this step-down converter reduces the mains AC voltage (90-240V AC) to a perfectly stable 5V DC output with a power of 3W. It is the ideal choice for microcontroller projects such as Arduino, ESP8266, ESP32, Smart Home automation devices, relays, and sensors. Its robust, sealed construction ensures excellent electrical isolation, low thermal load, zero noise, and long-term durability, providing a completely safe and professional power solution in an exceptionally small size.