90V rail clamp — 500W pulse in a DO-214AC
Minimum breakdown voltage is 100V, meaning the device starts conducting at that threshold. The 90V reverse standoff is the continuous DC voltage the diode can sit across without leakage becoming a problem — a 90V supply rail is the sweet spot. Maximum clamping voltage is 160V at 3.1A peak pulse current. That 160V ceiling is what the downstream circuitry sees during a surge — if your 90V-rated MOSFET or IC has an absolute max of 180V, this TVS gives you 20V of margin. This part can live in an outdoor telecom cabinet or an engine bay without derating the pulse power at high ambient.
The base product number SMAJ90 is a long-running series, so supply continuity is stable. The DO-214AC (SMA) package is widely stocked across distribution channels.