Why this part exists — the signal-integrity problem it solves
Its 0.42 pF capacitance at 1 MHz keeps the eye diagram open for USB 3.0, HDMI, and automotive Ethernet interfaces — a standard TVS with 3 pF would close the data eye at 5 Gbps. The steering topology shunts the ESD pulse to both VCC and GND, so the protected IC sees only a diode drop above the supply rail.
Automotive-grade qualification — what AEC-Q101 means for your PPAP
This part carries AEC-Q101 qualification, the discrete-semiconductor equivalent of AEC-Q100 for ICs. For an automotive Tier-1 or OEM PPAP submission, the Q101 report covers the full suite: HBM/CDM ESD robustness, pre-conditioning, high-temperature reverse bias, and temperature cycling. Capable is not qualified; this one is, on paper.
0.42 pF capacitance — the number that decides the interface
At 0.42 pF typical, the TPD1E05U06QDPYRQ1 adds negligible loading to a 90-Ω differential pair. For USB 3.0 (5 Gbps) the total capacitance budget on each signal is around 1.5 pF including the connector and PCB — this diode leaves margin for the rest of the trace.
Package and mounting — 0402 size, reflow reality
Supplied in a 0402 (1006 Metric) case — 1.0 mm x 0.6 mm — the TPD1E05U06QDPYRQ1 fits into the tightest I/O connector areas. The 2-X1SON (1x0.60) supplier package is a two-pin leadless side, no exposed pad. Surface-mount only; hand-solder is possible with tweezers and a fine tip, but the tiny footprint benefits from a stencil and reflow profile. MSL 1 out of the bag — no bake required before reflow as long as the reel seal is intact.
This is a current-production part, orderable in cut tape or full reels. For dual-sourcing or a second-source check, the base product number TPD1E05U06 is shared across several package and qualification variants; the QDPYRQ1 suffix denotes the AEC-Q101 qualified version in the supplier package.