What the 1.5 kW TVS rating means for your protection circuit
The 1.5SMC82CA R7G: Reverse standoff is 70.1 V typ — the circuit sees that impedance above the standoff before the Zener avalanche kicks in at 77.9 V minimum breakdown; at full peak pulse current the clamping ceiling is 113 V, so the downstream bus stays clamped within 113 V regardless of how much surge current flows up to 13.9 A. The CA suffix denotes a bidirectional (symmetric) configuration — a single bidirectional TVS replaces two back-to-back unidirectional devices on AC rails, saving a footprint slot in the layout.
Board-fit and thermal envelope
DO-214AB (SMC) is the standard surface-mount package for 1500 W TVS parts — the cathodic tab area under the body is the primary thermal conduction path to the board pad; adequate solder wetting and pad geometry matter more than any added heatsink for repetitive-pulse duty. Junction temperature rating is -55 to 150 °C, so the part covers both the cold end of outdoor equipment and the elevated-ambient conditions inside enclosed panels without derating the clamping performance for a one-shot surge event. Shipped on Tape & Reel — compatible with standard SMT pick-and-place line speeds for this package size without any special feeder modification.