Automotive TVS for 18.8V rails
The 1.5SMC22AHM3/I: Its 1500W peak pulse power rating (10/1000µs waveform) means it can absorb substantial surge energy without failing — useful for protecting sensitive electronics in telecom and automotive power distribution.
What the clamping specs mean for your rail
For a 24V automotive battery line that sees load-dump transients, the 30.6V clamp keeps the downstream DC-DC converter's input FETs within their 40V Vds rating — that is the margin that matters. The AEC-Q101 qualification certifies this part for automotive-grade reliability — temperature cycling, high-temperature reverse bias, and ESD robustness per the standard.
The wide-body SMC package handles the 1500W pulse without exceeding the junction temperature limit — the copper pad area under the cathode tab sets the thermal resistance to the board.