It clamps transients at 15V max with a 3.6V reverse standoff, so it sits on a 3.3V signal rail and stays out of the way until a discharge event hits. The headline number here is the 0.2pF capacitance at 1MHz — that's what keeps the eye diagram clean on USB 3.0, HDMI, or Gigabit Ethernet differential pairs. A generic TVS with 3pF would kill the signal; this part doesn't.
Active and available — no LTB scramble needed
Temperature range and package — fits the harsh stuff
The 0402 footprint is tiny — 1.0 mm x 0.6 mm — which matters when board space is tight and the ESD diode has to live right at the connector. Surface-mount only, no through-hole option.
One channel, bidirectional, no power-line protection
This is a single bidirectional channel — one device protects one differential pair or one signal line against positive and negative ESD strikes. The power-line protection flag is 'No', so don't put it on a VCC rail; it's meant for signal lines only. Peak pulse power is 27W, and the clamping voltage holds at 15V with a 2.5A peak pulse current (8/20µs waveform).