The SWA-1204W1 is a 4 kW DC switching power supply module manufactured by Tamura Corporation. It is a high-efficiency, wide-range switching power supply module with a full package specification. This module features a high power factor and low power loss to meet most system requirements in an optimum manner. The SWA-1204W1 is designed with a built-in PFC circuit, OVP/UVP protection, and soft-start circuit, and includes an oscilloscope port, temperature control and current protection functions. It is also equipped with a touch-screen LCD display panel for user convenience. This module is suitable for a wide range of applications, including AC/DC power conversion, charge management, and battery charging.