AEC-Q101 TVS for 12V rail protection
The 1.5SMC12AHM3_A/I: It clamps transients on a 12V nominal supply rail, with a 10.2V reverse standoff voltage meaning it stays transparent during normal operation and only conducts above that threshold. The clamping voltage at that current is 16.7V max, keeping downstream electronics within a safe voltage during load-dump or inductive kickback events.
Breakdown and clamping window
Minimum breakdown voltage is 11.4V, ensuring the device starts conducting before the protected rail exceeds the safe operating area of typical 12V-rated ICs. The 10.2V standoff voltage means continuous DC bias up to that level draws negligible leakage current. Operating temperature range spans -65°C to 150°C junction, covering under-hood automotive ambient and cold-crank conditions. The DO-214AB (SMC) surface-mount package handles the 1.5kW pulse without exceeding the package thermal limits when mounted with adequate PCB copper.