What the 1.5kW rating means for circuit protection fit
The 1.5KE18CA/54: Bidirectional clamping means a single device protects both positive and negative transients on the same line, which simplifies BOM count on AC-coupled or bipolar signal lines. The minimum breakdown voltage of 17.1V guarantees the TVS starts conducting before the protected circuit's absolute maximum rating is reached, given a typical 12V rail with a 16V abs-max input.
Package and temperature envelope for the DO-201AA axial TVS
Housed in a DO-201AA (DO-27) axial-lead package with through-hole mounting, this TVS suits point-to-point wiring or PCB layouts where the lead bend and body length must fit existing board keep-outs — the 1.5KE package code is the supplier device package reference.