What the clamping voltage means for your rail
The 1.5KE600CA: It clamps transients at 828 V maximum — meaning a 512 V nominal rail sees the spike shunted before it exceeds the downstream device's abs-max rating, as long as that device's breakdown sits above 828 V. Breakdown occurs at 570 V minimum, so the diode starts conducting well before the clamp voltage is reached. This gives a guard band for leakage current — the part stays below 1.8 A peak pulse current at the clamping point.
Board-fit and environment
Housed in a DO-201AA axial-lead package (also known as DO-27), the 1.5KE600CA mounts through-hole. The large body and lead diameter handle the thermal pulse of a 1.5 kW surge without lifting the trace — keep the lead bends short and the hole diameter to the recommended 1.1 mm for reliable solder fill.