TVS diode for 14 V rail protection
The SMBJ14CA-13: The minimum breakdown voltage of 15.6 V guarantees the protection triggers before the downstream circuitry sees a damaging overvoltage.
Housed in the DO-214AA (SMB) surface-mount package, the SMBJ14CA-13 occupies a standard footprint shared across the SMBJ series. The single bidirectional channel means one device protects both polarities on the same line — useful for AC-coupled or differential signal rails where the transient can swing either direction.