Transient protection for a 12.8 V rail
The 1.5KE15CA-E3/54: Its 12.8 V reverse standoff voltage means it sits across a 12 V nominal supply rail and stays transparent until a surge exceeds that level, then clamps at 21.2 V max while shunting up to 70.8 A of peak pulse current.
Voltage window and clamping behaviour
Breakdown occurs at 14.3 V minimum, so the device begins conducting before the rail exceeds the absolute maximum of downstream components rated for 15 V or higher. The clamping voltage of 21.2 V at 70.8 A ensures the protected circuit sees no more than that level during a 10/1000 µs surge event.
Housed in a DO-201AA (DO-27) axial leaded package, the device is through-hole mounted. The axial leads suit point-to-point wiring on terminal strips or traditional PCB layouts where the body stands off the board for convection cooling.