Parametric stack and fit decision
The 1.5KE170CA B0G: Breakdown occurs at 162 V minimum, so a rail held at 145 V sees no leakage from the TVS until a transient pushes past the breakdown threshold — the margin between standoff and breakdown is 17 V, typical for this voltage class. The 234 V clamping voltage at 6.7 A means the downstream silicon sees no more than 234 V across the transient; for a 200 V-rated MOSFET or IC, that leaves 34 V of headroom before the abs-max rating is hit.
Temperature grade and package reality
Supplied in bulk, not tape-and-reel — this matters for automated assembly: the part feeds from a tube or tray feeder, not a reel. Confirm the feeder compatibility before committing the pick-and-place program.
Where it fits and where it does not
Marked as General Purpose and explicitly not rated for power line protection — this TVS is intended for DC power buses, signal lines, and low-voltage AC circuits, not for 120/230 VAC mains input protection where a higher standoff and MOV or gas tube would be specified. For a 145 V bus (e.g., a 48 V telecom rectifier output after a boost stage, or a 120 V DC motor drive rail), the 1.5KE170CA B0G clamps before the downstream electrolytic capacitor's voltage rating is exceeded — the 234 V clamp is well below a 250 V-rated cap's surge limit.