What the 1.5SMCJ standoff and clamping ratings mean
The 1.5SMCJ9.0CA_R1_00001: The reverse standoff of 9 V sets the working rail the TVS watches without conducting — it sits idle below that threshold and only switches into avalanche conduction when a transient pushes it above the 10 V breakdown minimum.
DO-214AB package and thermal margin
Tape-and-reel and cut tape options mean the part ships in production quantities on reel for automated placement or as individual pieces for rework and prototyping — the package is consistent with the full 1.5SMCJ series footprint.