What the clamping specs mean for a 5V rail
The 1.5SMCJ6.5CA_R1_00001: The reverse standoff of 6.5V sets the working voltage — above this the TVS begins to avalanche, so it sits comfortably on a 5V rail with margin to spare. The minimum breakdown of 7.22V sits between standoff and clamping, which is the expected Zener knee for this class.
Bidirectional topology and general-purpose deployment
Bidirectional means the 1.5SMCJ6.5CA_R1_00001 clamps both polarities — unlike a unidirectional TVS which only handles one direction, this is the right fit for AC signal lines, differential pairs, or any rail that floats relative to ground. The series designation 1.5SMCJ is Panjit's 1.5kW peak-pulse family in the standard DO-214AB SMC package, which is the same footprint used by LittelFuse P6SMBJ, Vishay TVS diodes, and most other 1.5kW TVS families — cross-referencing to a compatible alternative is routine for this class.
Temperature grade and thermal margin
The 1.5kW rating is a 10/1000µs peak-pulse figure per the standard transient waveform definition: a 10µs rise and 1000µs fall. That is a short-duration surge rating, not a continuous power rating — the device absorbs the transient energy and returns to blocking once the pulse passes.