28V bidirectional TVS in DO-214AC — selection anchor
Its 28V reverse standoff voltage means a 28V DC rail or a 28V peak AC signal rides below the leakage threshold; the device stays off until the transient exceeds the 31.1V minimum breakdown voltage. The 45.4V maximum clamping voltage at 11A peak pulse current gives the protected IC a hard voltage ceiling — useful for downstream components rated to 50V or less.
Temperature range and mounting — field-fit check
Microchip lists the product status as Active, meaning no end-of-life notice is in effect.
Sourcing and procurement posture
As an active Microchip Technology line, the SMAJ28CAE3/TR13 is sourced to order against BOM quantities. The '' suffix indicates lead-free / RoHS-compliant finish, which is the standard for current production.