Automotive-grade Zener TVS for 40V rails
The 1.5SMC47A-AU_R2_000A1 is a Zener-type TVS diode from Panjit's 1.5SMC-AU series, qualified to AEC-Q101 for automotive applications.
Why the AEC-Q101 grade matters for your BOM
AEC-Q101 qualification means this TVS has passed the automotive stress tests: temperature cycling, high-temperature reverse bias, and ESD robustness per the standard. For a 40 V nominal bus in an ECU, the 40.2 V standoff voltage provides margin against steady-state ripple without triggering the TVS during normal operation. The 64.8 V clamping voltage at 23.2 A ensures the downstream ICs see a peak voltage well below their absolute maximum rating during a load-dump or inductive kick. The 1500 W pulse rating handles the energy of a typical automotive transient without the part failing short.