Package and rework — DO-214AA SMB
The SMBJ28AQ-13-F: The DO-214AA (SMB) package is a standard surface-mount footprint with a visible cathode band — pin 1 is the anode on the banded side, so you can orient it by eye under magnification without a continuity check.
Protection window — 28V rail, 45.4V clamp
With a 28V reverse standoff voltage and a minimum breakdown of 31.1V, this TVS sits on a 24V automotive bus without conducting at nominal — it only starts clamping above 31V. The 45.4V clamp at 13.2A (10/1000µs waveform) keeps the downstream 40V-rated silicon safe during a load-dump or alternator-field decay transient.
Automotive qualification and lifecycle
AEC-Q101 qualified — the part has passed the full automotive stress suite (HTRB, H3TRB, temperature cycling, ESD) and is PPAP-ready for Tier-1 submissions. The -55°C to 150°C junction range covers under-hood and engine-bay deployment.
