Zener TVS for 102 V rail protection
The 1.5SMC120A-M3/9AT: It clamps transients on a 102 V nominal rail — the reverse standoff voltage — and triggers breakdown at a minimum of 114 V, limiting the peak to 165 V at 9.1 A (10/1000 µs pulse).
1500 W pulse handling across temperature
The 102 V standoff means the diode stays transparent below the rail voltage, drawing negligible leakage. At 114 V minimum breakdown, it starts conducting; the 165 V clamp at 9.1 A sets the maximum voltage the protected load sees during a surge. Power line protection is not specified — this is a signal- or DC-rail TVS, not an AC mains suppressor.
Active production, sourced per RFQ
Listed as Active by Vishay.