12V rail clamp with 600W surge rating
Its reverse standoff voltage of 12V means the diode does not conduct at the nominal rail voltage, only clamping when a transient exceeds the breakdown threshold.
DO-214AA SMB footprint and temperature range
Housed in the DO-214AA SMB package, the device is surface-mount and suits automated assembly. The base product number SMBJ12 identifies the series; the suffix indicates lead-free / RoHS-compliant construction.
This is a standard TVS diode in a common package, so supply is generally stable through distribution. For a BOM line requiring this exact order code, we source against the RFQ quantity and confirm availability and pricing at quote time.