[Elecraft] KPA500 swr tolerance

[Jim Hoge]

Greetings,
In viewing the info on the KPA500, I see a spec for input swr of 1.5/1 but I cannot find any numbers for what the amp will tolerate from the antenna load. I assume it is low because it's a solid state amp but what exactly will it tolerate before it soft or hard faults? Perhaps I am misunderstanding the input swr as being from the transceiver?

Tnx es 73,Jim W5QM