Surge protection for 33.3V automotive rails
The 1.5KE39CAHA0G: Its 37.1V minimum breakdown voltage and 53.9V maximum clamping at 29A peak pulse current (10/1000µs waveform) define the protection window: the rail stays below 53.9V during a surge, while the 33.3V standoff ensures no leakage at normal operating voltage.
Package and board integration
Housed in a DO-201AA / DO-27 axial leaded package (supplier device package DO-201), the 1.5KE39CAHA0G is a through-hole component. The axial leads suit point-to-point wiring or PCB mounting with standard 0.100-inch pitch holes — the same footprint used by legacy 1.5KE-series parts, so a board already laid out for the series accepts this variant without changes. The single bidirectional channel protects one signal or power rail; no polarity concern since it clamps equally in both directions.
Listed as Active in production status, the 1.5KE39CAHA0G remains a current catalog item from Taiwan Semiconductor.