What the 1500W peak pulse rating means on the bench
The 1.5SMC16CAH: For a 13.6 V standoff rail, the 70 A peak pulse current capability means a fault that dumps that much current into the diode will be clamped at 22.5 V maximum before the silicon exceeds its thermal limit. The bidirectional channel (single device) protects signal or power lines that swing both positive and negative relative to ground — common on telecom line interfaces where the ring voltage reverses polarity.
Automotive grade and temperature envelope
The 150 °C TJ ceiling is the die temperature, not the case; the DO-214AB package's thermal impedance to the PCB copper plane determines the actual derating at high ambient.
DO-214AB (SMC) surface-mount package — the same footprint as standard SMC diodes, so it drops onto existing TVS pads without a layout change. The tape-and-reel delivery suits high-volume pick-and-place; the reel quantity is set by the supplier and confirmed at order.