Its 1500W peak pulse power rating handles surge events common in industrial power supplies, telecom line cards, and automotive load-dump scenarios.
The minimum breakdown voltage is 64.4V, which gives a guard band above the 58V reverse standoff. The clamping voltage peaks at 103V when the device is conducting 14.6A peak pulse current — that 103V ceiling is what the downstream circuitry must survive. Because the clamping voltage is 103V at the rated current, the protected rail should have components rated for at least that voltage (with margin). A 100V-rated MOSFET or capacitor is marginal; 120V or higher is safer.
Package and mounting for the board
The part ships on Tape & Reel (TR), which is the typical format for pick-and-place assembly. No power line protection feature is included — this is a standalone TVS, not a filtered or integrated protector.
The base product number is SMCJ58.