Specifications: The APY211G3EH is a high-current, ultra-compact SMD-4 PhotoMOS SSR. It is a 1 Form A (SPST-NO) device rated for 2.5A at 40V AC/DC. Its key feature is an ultra-low 55mΩ on-state resistance, which minimizes conduction losses. It offers 5000Vrms isolation and features 800μs turn-on and an exceptionally fast 20μs turn-off time. It operates across -40°C to 85°C with 1.2-1.4VDC control. Application Scenarios: Tailored for high-power-density applications where space is at a premium. Ideal for driving high-current loads like solenoids, motors, and LED arrays in compact industrial controllers, robotics joints, automotive ADAS and powertrain modules, server blade power management, and advanced consumer electronics, providing efficient and reliable switching with strong isolation.