What the ratings mean for a 1500 W TVS on an automotive line
The 1.5KE150AHA0G: The minimum breakdown voltage is 143 V. The 207 V clamp means a 24 V or 48 V automotive bus transient — say a load-dump event that spikes to 150 V — gets clipped well below the 250 V rating of downstream electrolytic capacitors, protecting the ECU's power stage.
Automotive qualification and temperature envelope
The 175 °C TJ max means it survives repeated transients in an engine-bay environment without derating the peak pulse power below the 1500 W figure.
Through-hole mounting means it swaps in on a field repair with a soldering iron; no hot-air station needed. The DO-201 body handles the 1500 W pulse without cracking the epoxy, provided the leads are trimmed to the board standoff height.