The 1.5SMC120CA_R1_00001: No last-time-buy window, no successor to track — this is a standard-catalog TVS that replenishes on normal lead times.
Surge rating and protection window
The 9.1 A peak pulse current at the 165 V clamping voltage means the diode absorbs a 1.5 kJ surge without failing short, protecting downstream silicon from transients like inductive load dumps or lightning-coupled spikes on a 102 V nominal rail. Breakdown voltage min is 114 V, clamping max is 165 V at Ipp, reverse standoff is 102 V. The 12 V gap between standoff and breakdown gives margin for steady-state ripple; a 102 V bus with 10 % tolerance stays below the avalanche threshold.
Bidirectional — one device for AC or bipolar rails
Single bidirectional channel — symmetrical Zener pairs back-to-back in one die. One part clamps both polarities, which simplifies the BOM for AC signal lines, bipolar supplies, or any pair where the transient can swing positive or negative relative to ground. No power line protection flag means this TVS is intended for secondary-side or signal-level rails, not for direct mains connection. The 102 V standoff voltage suits 48 V telecom buses, 72 V battery stacks, or 100 V DC links with normal ripple.
DO-214AB (SMC) surface-mount package — the standard 1.5 kW TVS footprint with a large copper tab for heat sinking into the PCB plane. Cut Tape works for prototypes or small-batch repairs.