Clamping parametrics and the 1500 W peak pulse rating
The 1.5KE27CA-G: The reverse standoff voltage is 23.1 V, meaning the device stays off the bus at normal operating levels up to that point. This clamping ceiling is what protects downstream silicon — a 24 V bus rail with a 40 V abs-max input sees the TVS hold the transient below the damage threshold.
Bidirectional single-channel layout
Single bidirectional channel — one device handles both positive and negative transients on the same line, saving a PCB position compared to back-to-back unidirectional parts. The DO-201AA / DO-27 axial leaded package (supplier device package DO-201) is a through-hole form factor suited for point-of-use clamping on power input rails, relay coils, or DC motor terminals where board space is not the constraint.
Rated for continuous operation from -55°C to 150°C junction temperature — this covers the full industrial and automotive under-hood envelope.