Widely applied in high-power household appliance power supply, industrial switching power supplies, inverter auxiliary power, welding machine auxiliary circuits, solar charge controller input rectification, emergency power supplies, outdoor charging equipment, industrial control power and air-conditioner outdoor unit power. Designed for mains AC-DC conversion and long-hour continuous operation; low-profile package saves PCB space, heat-sink compatible to raise continuous load capacity, strong surge resistance. This model is rated 3A / 400V, a medium-low power class device suitable for low-voltage circuits.