17V standoff — fits 12V and 15V rails
That means it sits across a DC rail and stays off until the voltage exceeds 17V — so it protects 12V and 15V supplies without leaking at normal operating levels.
500W peak pulse — DO-214AC rework-friendly
The DO-214AC (SMA) package is a surface-mount footprint that reworks cleanly with hot air — the body is small enough that the solder reflows before the board laminate sees damaging heat. Pin 1 orientation is marked by the cathode band; no hidden pads under the body, so lifting the part doesn't lift the pad.
Microchip lists the SMAJ17E3/TR13 as Active. The base product number is SMAJ17, and the suffix indicates RoHS-compliant termination finish.