Surge rating and protection thresholds
The 1.5SMC150CA V7G: The 128 V reverse standoff voltage (working voltage) means the TVS draws negligible leakage below that rail; the 143 V minimum breakdown ensures the device stays off during normal operation. Clamping at 207 V maximum limits the let-through voltage to a level a downstream DC-DC converter or line card can survive without secondary protection. Bidirectional construction — one channel — protects AC signal pairs or bipolar DC lines with a single component, saving board space versus two unidirectional devices in anti-series.
DO-214AB (SMC) is a standard JEDEC footprint with large solderable end tabs — the copper pad area under the package sets the thermal impedance for pulse dissipation, not the junction-to-case spec alone. The package body is large enough to hand-rework with a hot-air station at 260 °C without lifting the pad, provided the board has a solid thermal via array under the cathode tab.
Sourcing and compliance
Base product number 1.5SMC150 — the full order code 1.5SMC150CA V7G includes the bidirectional suffix (CA) and the V7G packaging/temperature code. The same die in a different reel quantity or unidirectional version shares the same footprint, simplifying BOM consolidation.