Clamping, breakdown, and temperature envelope
The 1.5SMC170AHM3/H: This gives a clear protection window for a 145 V rail — the TVS remains transparent during normal operation and starts conducting only when the transient exceeds 162 V. Operating junction temperature spans -65°C to 150°C (TJ), covering the full automotive underhood and industrial temperature extremes. The DO-214AB (SMC) surface-mount package provides a low-inductance path for fast transients and a solderable footprint compatible with standard reflow profiles.
