5000-watt peak pulse rating and clamping architecture
The 5KP200CA_R2_00001: Standoff is 200 V typical reverse standoff; the device breaks down no lower than 220 V and clamps at a maximum 324 V at the rated peak pulse current. At a 10/1000 µs waveform the peak pulse current rating is 15 A — which means the clamping voltage of 324 V is the ceiling under that event. The 5 kW peak pulse power rating is the governing selection figure for a TVS on a 200 V rail: it tells you how much transient energy the device can absorb before it clips rather than clamps.