Specifications: The APY221S is a classic, reliable signal and power relay. In an SOP-4 package, it switches 200mA at 60V (AC/DC) with a 2Ω on-resistance and provides 2500Vrms isolation. It switches in 150μs (on) and 50μs (off). Engineered for the industrial environment, it operates from -40°C to 85°C with a 1.2-1.4VDC control voltage.

Application Scenarios: This versatile relay is a staple in electronic design. It is commonly used for isolated digital I/O on microcontroller boards, driving reed relays or other optocouplers, switching backlight LEDs in displays, and providing a safe interface for sensors in factory automation, serving as a fundamental building block for countless control and interface circuits.