1500W clamping for a 36.8V rail
The 1.5KE43CA A0G: The bidirectional channel means a single device clamps both positive and negative surges symmetrically — useful on AC signal lines, bipolar supplies, or unipolar rails where the return path could see reverse transients. No power line protection rating means it is intended for signal or secondary-side DC bus protection, not mains input.
DO-201 axial package and thermal reach
Housed in a DO-201AA (DO-27) axial-lead through-hole package, the 1.5KE43CA A0G delivers its 1500W rating by sinking heat through the lead wires into the PCB copper or terminal block — the package body itself is not the primary thermal path. The 26A peak pulse current at the 10/1000µs waveform is the current the diode must carry during the clamping event — the 59.3V clamp voltage times 26A equals the rated 1500W peak power. For shorter pulses (8/20µs), the peak current capability is higher; for longer pulses, derate per the datasheet's pulse-width curve.
Active lifecycle, no EOL risk
The base product number 1.5KE43 is shared across unidirectional and bidirectional variants; the CA suffix marks this as the bidirectional version. The A0G suffix indicates the Tape & Box (TB) packaging — axial devices on tape for automated insertion, not bulk loose.