Widely used in switching chargers, LED driving power supplies, small appliance control boards, USB charging adapters, smart home modules, security camera power supply, router & set-top-box power, toy charging docks and internal auxiliary power of instruments. Ideal for high-density SMD PCB layouts and space-limited compact designs, SMT mass production with consistent quality, long-term stable operation under standard mains input and economical cost. This model is rated 4A / 1000V, a medium-low power class device suitable for mains / high-voltage applications.