AEC-Q101 qualification for automotive duty
The 1.5KE27CAHA0G carries an Automotive grade and is AEC-Q101 qualified, meaning it has passed the stress tests (temperature cycling, humidity bias, HAST) required for under-hood and chassis-mounted electronics in passenger and commercial vehicles. The reverse standoff voltage is 23.1 V typical, with a minimum breakdown of 25.7 V. This gives a 2.6 V guard band above a nominal 24 V rail before the diode starts conducting — enough to hold off steady-state ripple without nuisance clamping. Single bidirectional channel means a single device protects a signal pair or a floating line against both positive and negative transients, reducing component count on the board compared to back-to-back unidirectional parts.
Through-hole axial package, active production
Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE27CAHA0G mounts through-hole. The large body and thick leads handle the thermal pulse of a 1500 W surge without exceeding the junction temperature limit — the lead frame acts as a heat sink during the event.