Clamping performance — what the voltage ratings decide
The 1.5SMCJ28CA_R1_00001: The 28V reverse standoff is the maximum voltage the TVS sees in normal operation without conduction — the protected rail sits below this. The 45.4V clamping ceiling at peak pulse current is the voltage the downstream circuit experiences during a transient event; for a 28V rail this gives roughly 17 V of headroom above the operating nominal.
Thermal and package fit for demanding environments
Supplied in tape-and-reel or cut-tape packaging; confirm the ordering code suffix matches the delivery format before specifying the quantity — tape-and-reel is standard for automated placement, cut-tape for hand or proto builds.
Quoted to order through independent distribution against an RFQ; availability and lead time confirmed at quote time. No authorized-stock holding claim; confirm lot traceability and datasheet revision at order entry.