Bidirectional 17V TVS in a rework-friendly SMA package
Rated for 500W peak pulse power per the 10/1000 µs waveform, it clamps at 27.6V maximum, which means the downstream silicon needs to survive at least 28V before the TVS takes over (cites:,).
Clamping voltage and surge current — the real BOM limits
With a breakdown voltage minimum of 18.9V, the part starts conducting just above the 17V standoff, leaving a 1.9V window before the avalanche kicks in — tight enough to protect a 24V-rated IC on a 17V supply (cites:,). The peak pulse current is 18.1A for the 10/1000 µs shape, which is the current the diode must sink without exceeding the 27.6V clamp — a typical lightning or inductive-load transient on a 17V bus (cites:,).