What the 1500W rating means on the bench
The 1.5KE75A R0G: For the 1.5KE75A, that 1500W translates to a peak pulse current of 15 A at the 103 V clamping voltage. The 64.1 V reverse standoff voltage is the DC rail level where the diode stays off — below that, leakage is negligible. The breakdown starts at 71.3 V minimum, so on a 48 V nominal bus with 20 % tolerance (57.6 V max), this part holds margin before it starts conducting.
DO-201AA (DO-27) axial-lead package — the body is 9.1 mm long, the leads are 1.3 mm diameter tinned copper. It mounts through-hole, so the board needs a 1.2 mm drilled hole per lead; the axial form factor means the part stands off the board or lies flat depending on the bend radius. The R0G suffix on the order code indicates Tape & Reel packaging — 500 pieces per reel, suitable for auto-insertion. For hand-populated prototypes, the same die is available in bulk or ammo pack under the base number 1.5KE75A.
Sourcing and lifecycle posture
That means the factory continues to run it, and authorized distribution carries it as a standard line item. This is a unidirectional Zener TVS — one channel per package. If the BOM calls for bidirectional clamping on the same rail, the 1.5KE75CA (the 'C' suffix) is the back-to-back version; same standoff, same clamping, same footprint.