The 1.5SMC250AHE3_A/H is a Zener-type transient voltage suppressor from the Vishay 1.5SMC TransZorb series, qualified to AEC-Q101 for automotive applications.
Automotive qualification and temperature range
AEC-Q101 qualification means the part has passed automotive-grade reliability testing including temperature cycling, high-temperature reverse bias, and ESD robustness per the automotive electronics council standard. The part is designated for Automotive applications per the manufacturer's classification, making it suitable for 12V/24V automotive bus clamping, load-dump protection, and general transient suppression on power lines.
Vishay has marked the 1.5SMC250AHE3_A/H as Obsolete. For a BOM line already qualified with this AEC-Q101 TVS, the obsolete status means new designs should consider an active alternative in the same 1.5SMC TransZorb family with matching breakdown and clamp voltages, though pin-compatibility in the DO-214AB package is common across the series.