Four-channel Zener clamp for high-speed data lines
The Texas Instruments TPD4E6B06DPWR is a four-channel bidirectional Zener ESD protection array in a 4-X2SON package measuring 0.8x0.8 mm.
The 5.5V maximum reverse standoff voltage sits comfortably above a 5V supply rail, so the device stays off until an ESD event pushes the line above the threshold. Peak pulse power is rated at 40W, which is typical for a small-format ESD clamp — it handles the fast, high-voltage transients of IEC 61000-4-2, not sustained surge events.