The 1.5KE75CAHE3_A/C: The 64.1 V reverse standoff means it sits across a 48 V or 60 V nominal rail and never leaks until the transient exceeds that threshold.
That 32.7 V window between the standoff and the clamp is the headroom the protected circuit must survive — a 75 V-rated downstream capacitor or a 100 V-rated MOSFET has margin; a 60 V-rated part does not. The 14.6 A peak pulse current rating is the current the diode can sink at the clamping voltage for the 10/1000 µs double-exponential waveform. For a shorter pulse — say 8/20 µs — the peak current capability is higher, but the datasheet's power derating curve governs the real limit at elevated temperatures.
DO-201AA axial — hand-rework and board-fit reality
The axial form factor is common in point-to-point wiring, terminal blocks, and high-reliability assemblies where a surface-mount TVS might crack under vibration. The lead bend radius should follow the Vishay application note to avoid stress on the glass passivation at the body exit.
Active production — no last-time-buy pressure
The base product number 1.5KE75 is a long-running Vishay series, so the manufacturing tooling and wafer supply are mature.