This electronic part is a 30.1x23.1 millimetre RoHS (Restriction of Hazardous Substances Directive) manufactured electrical accessory from Yanchuang. The part number is B2 and it is a 2S+2S, two channels of dual switching solid-state relays (also known as SSRs). This part is used in applications such as lighting, heating, air conditioning, and motor control as well as any application that requires electrical isolation. The actuator module is compliant with UL certification and is tested up to 600V. It has a built-in LED status indicator and an operating temperature range of -40°C to +80°C. With its low power consumption and solid-state, it provides an efficient and cost-effective solution to your requirements.