The SMBJ33A with 53.3V 36.7V 33V SMB(DO-214AA) TVS ROHS is a transient voltage suppression (TVS) diode manufactured by Jingdao. It is designed to protect against voltage transient surges in sensitive electronic equipment, and is often referred to as a "surge protection device." The SMBJ33A is constructed in a surface mounted package, with a DO-214AA form factor, and is RoHS-compliant. It features a working voltage of 33V and a clamping voltage of 53.3V (with a 36.7V stand-off voltage.) The SMBJ33A offers superior clamping performance and low dynamic impedance to ensure effective protection against surges. The device is mainly used in low-voltage AC/DC power systems, and is suitable for use in automotive and industrial applications.