Bidirectional in one package — layout simplicity
The 1.5SMC11CAHM3/I: A single bidirectional channel protects against positive and negative transients on the same pair of nodes — no need to series two unidirectional devices or worry about polarity orientation during pick-and-place. The DO-214AB (SMC) package footprint is shared across the 1.5SMC family, so a layout designed for the 9.4 V standoff variant can be stuffed with a different voltage rating without a board spin.
