8.2 V zener with tight ±1.95% tolerance for automotive rails
The BZX84B8V2LYFHT116 is an 8.2 V zener diode from ROHM, part of the Automotive AEC-Q101 series. Its ±1.95% tolerance is tighter than the standard ±5% BZX84 grade, which matters when you need a predictable clamp voltage across temperature and lot variation in an automotive ECU or sensor module. Rated at 250 mW maximum power dissipation in a SOT-23 package — the thermal limit is set by the junction temperature ceiling of 150°C. In an under-hood environment at 85°C ambient, derate the continuous zener current accordingly; the 15 Ohm maximum impedance (Zzt) at the test current gives you the dynamic resistance for ripple filtering calculations.
Active production, AEC-Q101 qualified, SOT-23 footprint
The SOT-23 (TO-236-3, SC-59) footprint is shared across the BZX84 family, so a BOM swap to a different voltage or tolerance grade keeps the same land pattern.
Reverse leakage and package options for BOM planning
Reverse leakage is specified at 700 nA maximum at 5 V reverse voltage — low enough to not load a high-impedance reference node.