Specifications: The APY111G3S is a high-current, high-efficiency PhotoMOS SSR rated for 3.5A at 40V (AC/DC) in a compact SOP-4 package. It boasts an ultra-low 50mΩ on-state resistance, 2500Vrms isolation, and fast switching times of 400μs (on) and 30μs (off). It operates reliably from -40°C to 85°C with a 1.2-1.4VDC input. Application Scenarios: Designed for demanding high-current switching in space-constrained applications. Perfect for driving high-power solenoids, DC motors, or LED arrays in industrial automation, robotics, and advanced automotive systems. Also an excellent choice for high-efficiency point-of-load switching in server and telecom power supplies, where its low Rds(on) minimizes thermal stress and improves overall system efficiency.