1500 W peak pulse — what that means for the protection margin
The 1.5SMC22AHM3_A/I: That 49 A peak pulse current at the 30.6 V maximum clamping voltage tells you the device can absorb a substantial transient without failing — useful for automotive load-dump or telecom surge events where the energy is high but short. That window keeps the protected line safe while staying out of the way during normal operation.
Automotive grade and temperature range
AEC-Q101 qualification means this part passed the automotive stress tests — high-temperature reverse bias, temperature cycling, and ESD robustness. The same board layout accepts the whole voltage range, so a single PCB can be stuffed with different breakdown voltages depending on the rail being protected.
For compliance documentation, Vishay provides RoHS and REACH declarations for the 1.5SMC series.