Specifications: The APY237S combines medium current capacity with high-speed performance. Rated for 400mA at 200V (AC/DC), it features a low 1.8Ω on-state resistance and 2500Vrms isolation in an SOP-4 package. Its key attribute is the very fast switching: 40μs turn-on and 20μs turn-off. The relay is built for the -40°C to 85°C temperature range and uses a 1.2-1.4VDC input.

Application Scenarios: This high-speed, medium-power relay is perfect for pulsed applications. It is used in driving piezoelectric transducers for ultrasonic cleaning or sensing, controlling the flash tubes in photographic strobes, providing fast pulse modulation for laser diodes, and in electronic load switching for production testing, where precise and rapid control of substantial current pulses is required.