TVS selection for 24V automotive rails
The 1.5SMBJ24CA-H: The -55°C to 150°C junction temperature range covers under-hood and cabin electronics without derating. The DO-214AA (SMB) package footprint is shared across the 1.5SMBJ series, so a single PCB layout can accommodate multiple voltage variants. The bidirectional channel protects signal pairs where the line swings both above and below ground — common on CAN, LIN, and sensor interfaces.
Sourcing and compliance
The 1.5SMBJ series includes other voltage grades (e.g., 5V, 12V, 36V standoff) in the same DO-214AA package, but a voltage change requires a board-level re-evaluation of the clamping margin.