The SMBJ15A with SMB(DO-214AA) TVS RoHS manufactured by TWGMC is a unidirectional surface-mount unidirectional transil diode. It has an operating voltage of 15V with a maximum operating temperature of 175 degrees Celsius. The device is designed to protect voltage sensitive components from ESD (electrostatic discharge) transients. It should be noted that this part is RoHS-compliant and is conformally coated for greater protection in harsh environments.