The 1N6144AUS: It is a single bidirectional channel with a reverse standoff voltage of 9.1V and a maximum clamping voltage of 16.9V at 88.8A peak pulse current. The SQ-MELF (C) surface-mount package suits automated assembly and high-reliability applications where a hermetic seal is not required but a robust ceramic body is preferred.
The 175°C upper limit gives headroom for derating when the device is mounted near hot components or in a sealed enclosure with limited airflow.
The base product number is 1N6144, and the 'AUS' suffix denotes the SQ-MELF package variant. Verify the BOM line calls for this exact suffix.