What the 1.5kW peak pulse rating means for transient survival
The 1.5SMCJ70A_R1_00001: The 1.5 kW peak pulse rating defines the maximum transient energy the diode absorbs during a 10/1000 µs surge event — that waveform shape is the standard IEC 61000-4-5 test curve, so the clamping voltage of 113 V at 13.3 A peak is the clamping ceiling under the exact conditions the rating assumes. When a surge hits, the TVS clamps within nanoseconds and the 113 V ceiling protects whatever rail sits behind it — a 70 V nominal standoff means the protected line runs normally up to that level without the diode conducting.
SMC package — what the DO-214AB footprint means on the board
Surface-mount termination means it reflow-solders to the board like any other SMC component — Tape & Reel or cut-tape packaging suits both high-volume assembly and low-quantity rework bench pull.