The Panasonic Solid State Relay AQY221R2VW is a 4-pin optically isolated AC/DC relay designed for use in a variety of applications. It features a 40V maximum load voltage and a 250mA maximum load current. It is designed to provide reliable switching performance with low power consumption and minimal heat generation. The AQY221R2VW is suitable for use in a wide range of applications, including industrial automation, home automation, and medical equipment. It is also suitable for use in applications where high-speed switching is required. The AQY221R2VW is RoHS compliant and is available in a 4-pin SSOP package.