While a single "official" datasheet is rare for these modules, reverse-engineered schematics reveal a standard .
: Built-in overvoltage, overcurrent, overheating, and short-circuit protection. Schematic and Circuit Architecture wx-dc12003 schematic
: A high-frequency transformer provides the 3kV galvanic isolation between the primary (hot) and secondary (safe) sides. While a single "official" datasheet is rare for
The is a compact, isolated AC-DC switching power supply module frequently used by electronics hobbyists and industrial designers for low-power applications. It is primarily designed to convert high-voltage AC mains (typically 85–265V) into a regulated 5V DC output with a maximum current of 700mA. Its isolated design ensures that the high-voltage input is galvanically separated from the low-voltage output, which is crucial for safety in microcontrollers like the Arduino or ESP32. Key Specifications The is a compact, isolated AC-DC switching power
: The AC input typically passes through a small EMI filter and a bridge rectifier. A high-voltage electrolytic capacitor (often 4.7µF, 400V) smooths the rectified DC.
: Approximately 80% with a no-load power consumption of less than 0.05W.
: On the output side, a Schottky diode rectifies the transformer's output, which is then filtered by high-quality capacitors to minimize ripple (typically around 60mV at 50% load).