Clamping and signal integrity trade-off
The D5V0L1B2T-7: Capacitance is 15pF at 1MHz — low enough that high-speed data lines (USB 2.0, HDMI, Ethernet) see minimal signal degradation from the added load, but not as low as a dedicated ESD diode in the sub-1pF range.
Housed in SOD-523 (SC-79), the part measures roughly 1.2mm x 0.8mm with a seated height around 0.6mm — the small footprint suits dense layouts where a larger SOT-23 would crowd the routing channels.
