1500W peak pulse rating — what the clamp ceiling means for the design
The 1.5SMC8.2CA: The 12.1V maximum clamping voltage at 125.6A peak pulse current defines that ceiling at full surge. The 7.79V minimum breakdown voltage is the trigger point where the device begins conducting, and the 7.02V typical reverse standoff is the maximum operating voltage the protected rail sits below without the TVS conducting.
No official successor or cross-reference sibling is listed for the 1.5SMC8.2CA in the available record — if the exact part is unavailable, the 1.5SMC series offers multiple standoff-voltage options in the same package that may cover the design, but a parametric cross-reference should be confirmed against the circuit requirements before specifying an alternative.