Zener TVS for automotive transients – what the ratings mean
The P6SMB12AT3: The 10.2V reverse standoff voltage and 16.7V clamping limit protect 12V rails from load-dump and inductive kickback.
Parametric fit – clamping, capacitance, and temperature range
Breakdown voltage min is 11.4V, clamping max at 16.7V with a peak pulse current of 36A – this gives a 5.5V clamping window above the 12V nominal rail, which is tight enough to protect downstream regulators without nuisance triggering. Capacitance is 1435pF at 1MHz, so it loads the line but stays acceptable for low-speed power and signal lines.
onsemi lists the P6SMB12AT3 as obsolete. For BOM continuity, the part is sourced through qualified independent distribution – we confirm traceability and date-code freshness per RFQ. The SMB package and unidirectional polarity are standard; confirm the mating footprint and orientation before committing.