Active production — 17V bidirectional TVS in DO-214AC
Bidirectional clamping means it protects signal or power lines that swing both positive and negative relative to ground — useful on AC-coupled data lines or bipolar supplies where a unidirectional part would clip one polarity.
Breakdown and clamping — what the 18.9V min and 30.5V max mean for your rail
Minimum breakdown voltage is 18.9V. A 17V rail sees no leakage at steady state; the TVS only begins conducting when the transient pushes the line above 18.9V. The clamping voltage of 30.5V is the worst-case ceiling at 16.4A peak current. If the downstream IC has an absolute-max rating below 30.5V, you need a lower-clamp part or additional series impedance. For shorter pulses (e.g. 8/20µs from ESD), the part can absorb significantly more peak current; the datasheet derating curve should be consulted for non-standard waveforms.
Surface-mount DO-214AC (SMA) package. No power-line protection feature — this is a signal- or low-power-rail protector, not a mains-side suppressor. General-purpose application class.