Specifications: The APY224S is a medium-voltage PhotoMOS SSR in an SOP-4 package. It is a 1 Form A (SPST-NO) relay rated for 130mA at 400V AC/DC. It has a 12Ω on-state resistance, provides 2500Vrms isolation, and features symmetrical switching times of 100μs for both turn-on and turn-off. It operates from -40°C to 85℃ with 1.2-1.4VDC control. Application Scenarios: A general-purpose relay for medium-voltage, low-current switching. Applications include industrial sensor and transducer interfaces, medical device control, power supply output enabling, and as an isolation switch in test and measurement equipment, offering balanced switching performance and reliable operation in a standard, manufacturable package.