The 1N6271AHE3_A/C is an automotive Zener-based transient voltage suppressor (TVS) — Vishay's TransZorb® designation — in the through-hole DO-201AA (DO-27) body, mounted on the PCB via axial leads and shipped on Tape & Reel (TR). The AEC-Q101 qualification confirms the part was stress-screened to automotive reliability standards for the ambient temperature band it will see inside the engine bay or chassis harness.
Clamping ceiling and the standoff margin
The reverse standoff voltage is 8.55 V typical, and the minimum breakdown triggers at 9.5 V — so the part sits idle on a 12 V rail with comfortable headroom. When a transient arrives, the maximum clamping voltage across the full 103 A peak pulse current is 14.5 V. That 1.7× ratio between standoff and clamping ceiling is the clamping ratio the downstream protected circuit must survive — a sensitive ECU input rated for 16 V absolute maximum will see the transient clamped well below its limit. The 103 A peak pulse current rating at 10/1000 µs is the waveform condition for the 1.5 kW figure; higher-energy transients or slower waveforms derate the available peak power, so the waveform shape matters as much as the headline number when selecting the suppressor for a specific threat profile.
175°C junction temperature and automotive duty
The DO-201AA axial leadframe gives the die good thermal conduction down the leads to the PCB pad, but board-level thermal design still sets the practical continuous dissipation limit. At elevated ambient, the thermal resistance junction-to-ambient governs how much of that 1.5 kW peak budget converts to a DC derated rating; the datasheet curve is the reference for that conversion, not a simple datasheet table entry.
Listed as Active by Vishay General Semiconductor — Diodes Division. The base product number 1N6271 anchors a series, but the specific suffix and AEC-Q101 screening level for the AHE3_A/C variant means any alternate source must be evaluated for the same automotive grade. Sourced to order per BOM quantity against an RFQ; availability and current lead times confirmed at quote time.