Specifications: The APY154G1S is a high-voltage, medium-current PhotoMOS SSR in an SOP-4 package. It is a 1 Form A (SPST-NO) relay rated for 1.0A at 400V AC/DC. It features a low 0.6Ω on-state resistance, provides 2500Vrms isolation, and switches with 1800μs (on) and a fast 30μs (off) time. It operates from -40°C to 85℃ with a 1.16-1.32VDC control input. Application Scenarios: Suited for switching medium-power loads at high AC line voltages. Common applications include appliance control (air conditioners, washing machines), industrial motor starters, power management in HVAC systems, solid-state lighting controls, and as a reliable main switch in various industrial and commercial equipment, offering a good combination of current, voltage, and efficiency.