Device identity and key parametrics
The 1.5KE9.1CAHE3/51: Reverse standoff voltage is 7.78 V typical, with a breakdown range starting at 8.65 V min. The single bidirectional channel protects signal or power lines against both positive and negative transients without needing two devices.
For existing BOM lines, the 1.5KE9.1CAHE3/51 is available through independent surplus and broker channels.
Housed in a DO-201AA (DO-27) axial leaded package, the device is intended for through-hole mounting. The 1.5KE package footprint is standard across the series, simplifying layout if a different voltage variant is substituted.