What the voltage ratings mean for your circuit
The 1.5SMC75AS_R1_00001: When a surge arrives, the device snaps into conduction at the 71.3V minimum breakdown level and clamps the line at 103V maximum, clamping voltage being the peak voltage the downstream IC or load actually sees during the event.
Peak pulse power and thermal margin
The 150°C maximum junction temperature gives significant thermal headroom for transient events; the gap between this limit and the operating ambient determines the derating headroom available in enclosed or high-temperature equipment panels.
Package and mounting
The DO-214AB SMC is the standard medium-power TVS footprint at this wattage — the cathode bar in the center of the package identifies the unidirectional polarity, and the pad layout matches across the broader 1.5SMC series for easy drop-in swaps.