What the 1500W pulse rating buys you
The 1.5KE200CA_R2_00001: That 1500W figure means the device can absorb a transient energy pulse of that magnitude without failing — it clamps the overvoltage by shunting the surge current through the avalanche junction. The reverse standoff voltage is 171V, meaning the diode will not conduct appreciably below that level. For a 200V nominal rail, this TVS sits just above the operating voltage and triggers before the downstream components see a destructive overvoltage. Operating temperature spans -65°C to 175°C junction, which covers both cold-start and hot-running conditions in industrial or telecom equipment. The DO-201AE axial package is through-hole mounted, so it withstands the mechanical stress of the leads during wave solder and maintains a low thermal resistance path to the board.
Obsolete — sourcing through independent channels
Panjit has marked the 1.5KE200CA_R2_00001 as obsolete. No official successor or direct replacement part number is listed by the manufacturer.