Automotive-grade transient suppression — AEC-Q101 qualified
The 1.5KE18AHE3_A/C is a Vishay TransZorb® TVS diode from the Automotive series, carrying AEC-Q101 qualification — this is the automotive discrete semiconductor reliability standard covering temperature cycling, ESD sensitivity, and PPAP documentation. The 'H' suffix in the order code indicates the automotive-grade screening. The 17.1 V minimum breakdown voltage gives a 12% margin above the working voltage before avalanche conduction begins.
Temperature envelope and deployment context
The 175°C TJ(max) is consistent with AEC-Q101 Grade 0 requirements, which mandate operation at 175°C or above for engine-bay and transmission-mounted electronics. Packaged in a DO-201AA (DO-27) axial leaded form factor with the 1.5KE supplier device package designation. The through-hole mounting suits point-to-point wiring, terminal blocks, or PCB hole patterns where the axial body lies flat or stands off the board for convective cooling.