Clamping architecture — standoff, breakdown, and the 108.15V ceiling
The 1.5SMC75C: Drawing 14.8A through the clamp during a surge event is brief — the 10/1000 µs waveform limits the energy dump — but the DO-214AB copper tab thermal path is what prevents the junction from hitting 150°C during repetitive transients; the board layout and pad geometry under the SMCJ package directly govern the thermal impedance from junction to ambient.
Wide junction temperature range for demanding environments
The 1.5SMC series carries a 1500W peak pulse rating, and the wide temperature range reflects the series' suitability for industrial power and power-conversion environments rather than consumer-only applications.
Sourcing status — obsolete, independent-channel supply
For a BOM line still running this part, the sourcing path is independent distribution carrying residual inventory; RFQ confirms availability and lot traceability before committing.