600 W peak pulse — what it buys the board
That 600 W rating means the part can clamp a 25.1 A transient down to 24.4 V maximum, protecting a 15 V rail from surges without needing a series resistor or fuse.
Bidirectional — one part covers both polarities
A single bidirectional channel handles positive and negative transients symmetrically, so you place one device across the rail and ground — no need to orient a cathode. The breakdown voltage starts at 16.7 V minimum, and the reverse standoff is 15 V, which leaves a 1.7 V guard band before the TVS begins conducting on a nominal 15 V supply.