1500W peak pulse clamping — what the TVS numbers mean
The 1.5SMC6.8CAHM6G clamps a 1500W (1.5kW) peak pulse at the 10.5V maximum clamping voltage, which is the ceiling the protected load sees when the transient hits — that 10.5V is the design target for whatever circuit sits downstream. The 5.8V reverse standoff typ is the working rail the TVS idles across without conduction; the 6.46V minimum breakdown is where it begins to turn on and absorb the surge. At 150A peak pulse (10/1000 µs), the device is sized for the input-side bulk cap discharge and cable-induction events common on the 12V automotive rail, not for the higher-energy 8/20 µs surge curves — those call for a different pulse-shape rating on the same series.
AEC-Q101 automotive grade for under-hood deployments
The AEC-Q101 qualification means it passed the automotive reliability stress suite including humidity, temperature cycling, and surge life — this is the baseline gate for any ECU input-protection line in the powertrain domain, not cabin-level electronics.