1.5kW peak pulse power in a DO-214AA footprint
The 1.5SMBJ43CA: It is qualified to AEC-Q101, the automotive-grade stress and reliability standard, which means it passes the temperature cycling, high-temperature reverse bias, and ESD tests required for under-hood or chassis-mounted electronics.
Where a 43V bidirectional TVS fits on the board
Surface-mount in a DO-214AA (SMB) package, the 1.5SMBJ43CA sits on a standard SMB footprint with the cathode band marking the common terminal — the bidirectional construction means polarity doesn't matter for the protection path. The 21.7A peak pulse current (10/1000µs) sets the surge-handling ceiling; for longer-duration transients, derate per the pulse-width curve in the datasheet.
Sourcing and lifecycle posture
No official pin-compatible successor or second-source cross-reference is published by Bourns for this order code. The 1.5SMBJ series includes multiple voltage variants in the same DO-214AA footprint; the 43V standoff version is the one that matches a 43V rail.