Automotive-grade TVS for 24V rails
The 1.5SMC24CA-AU_R1_000A1: Its 20.5 V reverse standoff voltage and 22.8 V minimum breakdown voltage place it squarely on a 24 V nominal supply rail — the clamping voltage of 33.2 V at 45 A peak pulse current keeps the downstream silicon within its abs-max rating during load-dump or inductive kickback events.
The SMC footprint is standard for 1500 W TVS diodes; the copper pad area under the cathode tab sets the junction-to-ambient thermal resistance, so the PCB layout should follow the recommended land pattern in the product drawing to achieve the rated peak pulse power.