What the 1.5SMCJ180CA_R1_00001 is and how it clamps
The 180V reverse standoff is the continuous working voltage the line can sit at without the device conducting; when a surge exceeds the 198V breakdown minimum, the TVS avalanches and clamps the peak at 292V while conducting 5.1A of the 10/1000µs surge current. The 1.5kW peak pulse rating defines the surge energy the device can absorb in that 10/1000µs waveform — a short, fast transient like a switching spike or inductive kick. The 292V clamping ceiling at full surge current is what the downstream circuitry sees; a sensitive IC behind this TVS must survive that clamped level without damage.
Temperature grade and deployment context
This makes the part viable for industrial enclosures and outdoor equipment that runs hot, not just benign office environments. Applications are listed as general purpose, meaning it is not AEC-Q qualified for automotive — if that is a requirement, confirm the automotive-grade 1.5SMCJ variant exists before committing.