1500 W peak pulse — what that buys you on the rail
That 1.5 kW rating means it can clamp a hefty transient without failing — useful on 5 V or 3.3 V supply rails where a surge from an inductive load or a hot-plug event would otherwise kill the downstream regulator or ASIC. The clamping voltage maxes out at 14.5 V at the peak pulse current of 690 A (8/20 µs), so the protected rail sees a hard ceiling well below the absolute maximum of most 5 V logic.
Breakdown and standoff — picking the right voltage tier
Reverse standoff voltage is 6.4 V, meaning the diode stays off below that level. Breakdown starts at a minimum of 7.13 V.
DO-214AB SMC — rework and footprint notes
It reworks cleanly with hot air — the body is large enough to get a good grip with tweezers, and the cathode band is clearly marked on the top. No exposed pad underneath, so you don't need a bottom-side preheater. Just watch the soldering profile; the junction can handle 150 °C continuous, so standard lead-free reflow is fine.
Active and available — no LTB worry
STMicroelectronics lists the SM15T7V5A as an active product. That means it stays in the BOM for new designs without a sunset date looming.