Surge rating and protection window
The 1.5KE6.8A/B: The reverse standoff voltage is 5.8 V, with a minimum breakdown of 6.45 V — this gives a tight protection window for 5 V logic or bias rails. The single unidirectional channel is polarity-sensitive; the cathode band marks the anode side for correct board orientation. No power-line protection (: No) — intended for signal or low-voltage DC bus clamping, not AC mains.
Package and rework fit
DO-201AA / DO-27 axial leaded package (supplier device package DO-201) — through-hole mounting with 0.042-inch diameter leads. The axial body is easy to hand-solder or wave-solder; the leads can be formed for vertical or horizontal board placement. No fine-pitch or BGA rework needed. The leaded package handles repeated thermal cycles without solder-joint fatigue — a plus for field repair or rework under a hot-air station.
YAGEO lists the 1.5KE6.8A/B as Active.