The 1.0SMB47CA with 64.8V 44.7V 40.2V SMB(DO-214AA) TVS ROHS is an electronic part (Transient Voltage Suppressor Diode) made by Yageo. It is designed to protect against electrical transients, such as spikes and surges, and has an extremely low capacitance. It is RoHS compliant, meaning it is free of hazardous substances, and features a DO-214AA (SMB) package, which is a relatively small, surface-mount package. It has a voltage range of 64.8V to 44.7V, with a peak pulse power rating of 40.2V.