The 1.5SMC10A R7G: It clamps a transient at 14.5V maximum when the surge current hits 108A — that's the voltage the protected node actually sees during the event, not the standoff level. The reverse standoff voltage is 8.55V typical, meaning the diode stays off below that DC bias and only starts conducting when the transient pushes past the 9.5V minimum breakdown. For a 5V or 3.3V rail this is overkill; it is sized for a 8V–9V bus where the normal operating margin sits below the standoff threshold.
Package and board-fit: DO-214AB (SMC)
Housed in a DO-214AB (SMC) surface-mount package, the same footprint as the standard SMC diode. The cathode band marks the unidirectional orientation — the anode is the tab side. Operating junction temperature range is -55°C to 150°C, so it handles the thermal cycling of outdoor or industrial enclosures without derating the peak pulse power at the high end.