AQS225R2SX is a 4-channel (4 Form A) PhotoMOS relay designed for multi-circuit switching applications in a compact SOP16-pin package. It features low on-resistance of 10.5O typical, output capacitance of 4.5pF typical, and fast turn-on time of 0.04ms typical, making it suitable for RF and low-level analog signal control. The device supports an 80V load voltage with 70mA continuous load current and provides 1,500V AC I/O isolation voltage. Operating temperature ranges from -40°C to +85°C, ensuring reliable performance across various environments. Common applications include measuring and testing equipment such as IC testers, probe cards, and in-circuit testers, as well as communication, broadcasting, and medical equipment.