AEC-Q101 TVS for 12V/24V automotive rails
The 1.5KE39AHE3_A/D: With a breakdown voltage range of 37.1V minimum and a clamping voltage of 53.9V at 27.8A peak pulse current (10/1000µs waveform), this part absorbs load-dump and inductive kickback energy without letting the protected rail exceed the downstream silicon's absolute maximum rating.
Thermal and package reality for the BOM
The DO-201AA (DO-27) axial-lead package handles the 1500W peak pulse through its copper leadframe and large junction area. Through-hole mounting with axial leads means the part is wave-solder friendly and stands up to mechanical shock better than a surface-mount equivalent in high-vibration environments. The 1.5KE package footprint is standard across the series, so a single PCB layout accommodates any voltage variant in the family.
Active production and compliance posture
As an AEC-Q101 qualified device, it ships with full PPAP documentation and traceability. The TransZorb® series is RoHS-compliant and meets the automotive-grade reliability screening per AEC-Q101 Rev E.