9.1 V zener, 500 mW — the BOM-fit numbers
The Vishay TZMB9V1-GS08 is a 9.1 V zener diode from the Automotive AEC-Q101 TZM series, rated for 500 mW continuous power dissipation in a SOD-80 MiniMELF surface-mount package. Tolerance is ±2%, which holds the regulation voltage tighter than the standard ±5% grade — useful if the downstream rail has a narrow input window.
It is the grade required for production parts in safety- or reliability-critical automotive modules. The series designation (Automotive, AEC-Q101, TZM) is the same qualification that covers the rest of the TZM family, so a BOM using multiple zener voltages from this series shares a single qualification trace.
Package and footprint — SOD-80 MiniMELF
The SOD-80 MiniMELF (DO-213AC) is a glass-passivated, end-capped cylindrical package. It places flat on the pad with no leads to bend — tombstoning risk is low if the pad geometry matches the recommended land pattern. Surface-mount only; no through-hole variant.