Key ratings and what they mean for protection
The 1.5KE12CAHE3/51: The bidirectional configuration (single channel) means it protects both positive and negative transients on the same line — useful for AC-coupled or floating signal pairs where polarity is not fixed.
Part of the Automotive, AEC-Q101, TransZorb® series — AEC-Q101 certification means it meets the automotive-grade stress and reliability tests (temperature cycling, high-temperature reverse bias, and ESD) required for under-hood or cabin electronics.
Package and board integration
Supplied in a DO-201AA / DO-27 axial-lead through-hole package. The bulk packaging (not tape-and-reel) means it is suited for hand-insertion or low-volume assembly rather than automated pick-and-place. The axial leads require through-hole pads on the PCB; the body diameter and lead spacing are standard for this DO-201 footprint.