AEC-Q101 qualification and temperature envelope
The 1.5KE11CAHE3_A/D: The junction temperature range spans -55°C to 175°C, covering the hot soak after engine shutdown where ambient under the hood can reach 125°C with the device self-heating from repetitive surges.
DO-201AD axial package — surge handling in a through-hole footprint
The DO-201AA / DO-27 axial-leaded package is the standard through-hole form for high-surge TVS diodes. The large body and lead cross-section handle the thermal pulse of a 1500 W, 10/1000 µs event without the junction temperature exceeding the 175°C limit. The axial leads mount into plated through-holes on the PCB; the lead bend radius should follow the manufacturer's recommendation to avoid stress cracking the glass passivation at the lead exit.
Sourcing and lifecycle posture
The base product number 1.5KE11 covers the family; the full suffix HE3_A/D specifies the AEC-Q101 qualified, bidirectional, tape-and-box variant.