The SMAJ210CA with 340V, 237V, and 210V SMA (DO-214AC) is a transient voltage suppression (TVS) diode manufactured by the Yageo Company. It is RoHS (Restriction of Hazardous Substances) regulated and designed for applications with surge current protection for electronic devices in order to protect them from damage due to high-speed, short-duration, over-voltage and over-current transients. This device has low capacitance values and a hardened epoxy base hump for superior performance. It is lead-free and environmentally friendly, making it an excellent choice for applications where environmental considerations are taken into consideration.