Transient suppression for 136 V rails
The 1.5KE160CA-E3/54: It clamps at 219 V maximum and handles a peak pulse current of 6.8 A, making it a fit for protecting 136 V nominal DC buses against transients like inductive kickback or lightning-induced surges. The breakdown voltage range starts at 152 V minimum, so the part stays transparent below the rail voltage and only starts conducting when a surge pushes the line above that threshold.
Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE160CA-/54 is a through-hole part — it solders into a board the same way a power rectifier does. The 1.5KE supplier device package marking is standard for this family.