Automotive-grade Zener TVS in DO-214AA SMB
onsemi P6SMB33CAT3 is a bidirectional Zener transient-voltage-suppression diode rated for 600 W peak-pulse power with a 28.2 V reverse standoff voltage. The part carries AEC-Q101 qualification, making it suitable for automotive electronic modules, engine-control units, and other vehicle-bus protection where the supplier must show the AEC-grade trace. Clamping voltage is 45.7 V at the 13.2 A peak-pulse current — the margin between the standoff rail and the clamp determines whether downstream ICs survive a load-dump or inductive kick.
Obsolete — plan a replacement or last-time buy
onsemi lists the P6SMB33CAT3 as Obsolete. For a BOM line that still needs the 33 V bidirectional rating in a DO-214AA SMB, the procurement desk should evaluate a last-time-buy window or a pin-compatible cross from a different onsemi P6SMB voltage code or an equivalent AEC-Q101 TVS from Vishay / Littelfuse / Bourns — the 28.2 V standoff and 45.7 V clamp are the matching targets.
Package, mounting, and operating range
Supplied in DO-214AA (SMB) surface-mount package. The junction temperature range is -65°C to 150°C — the wide span covers under-hood automotive and outdoor telecom enclosures where ambient can reach 105°C and the TVS self-heats during a pulse.