The P6SMB7.5AT3: No official successor is recorded; the base product number P6SMB family may carry active variants, but this specific order code is no longer in factory production.
Automotive-grade transient protection
The 6.4V reverse standoff voltage protects 5V and 3.3V rails from load-dump and inductive kickback transients.
Housed in a standard SMB surface-mount package shared across the P6SMB family. The 2180pF capacitance at 1MHz is typical for a 600W TVS at this voltage — it will load high-speed data lines, so keep it on power rails or low-frequency signal inputs.