This datasheet seems to promote specific TVS diodes as good for absorbing an automotive load-dump. This graph seems to support the idea:
However, these other graphs seem to contradict any load-dump absorption capabilities:
Extending the line on the third graph to 200 ms (half way point to 400 ms of load dump event, worst case) shows some ~1.6 kW capability.
For the SM8S24A, worst case peak power will be 38.9 * (79 - 38.9) / 0.5 = ~3.1 kW - which is almost double what the part can withstand even at room temperature.
I have noticed this other oddity:
Maximum Peak Pulse Power Dissipation (10/1000 μs) P PK 6600 W
Maximum Peak Pulse Power Dissipation (10/10000 μs) P PK 5200 W
In the 3rd graph it looks like they are using a 10 μs rise time and then just stretching td up to 100 ms? ISO talks about 10 ms rise time, not 10 μs. Can someone shed light on this? Is the part actually up to the task or is this some marketing trickery and nothing else?
Are Vishay and Bourns related companies? Here is their (Vishay) 6.6 kW diode, pretty much the same thing: