What this TVS diode protects and how it's rated
Its peak pulse power rating is 600W for a 10/1000µs waveform, which covers most industrial surge events like load-dump or inductive kickback. The reverse standoff voltage is 13V — that's the DC rail voltage the part sits across without conducting. Breakdown starts at 14.4V minimum, and clamping is guaranteed at 21.5V maximum at the peak pulse current of 27.9A.
It's classified for general-purpose applications — no power-line protection rating, so keep it on signal or low-power DC rails where the 13V standoff matches.