Understanding D2 Functionality
Thought for 46 sec
D2 is a dual-channel transient-voltage-suppressor (TVS) diode (Würth Elektronik WE-TVS-82400102) placed across the USB data lines to protect against ESD and surge events. Key details:
Table
| Feature | Specification |
|---|---|
| Function | ESD/surge protection for USB D+ and D– lines |
| Topology | 2 channels + common cathode (2 + 1) |
| Clamping Voltage (typ.) | 7.7 V at 1 A (Transmission Line Pulsing) |
| Peak Pulse Current (8/20 µs) | 6 A |
| Package | SOT-23-6L |
| Operating Temperature | –55 °C to +125 °C |
| Compliance | IEC 61000-4-2, ‑4, and ‑5 |
| Datasheet | Datasheet (PDF) |
By clamping any fast voltage spikes on USB1’s DP and DN nets to ground, this part safeguards the CH340C USB interface and downstream circuitry against electrostatic discharge and other transient overvoltages.
Add TVS diode
Enforce placement
Assign net class
Extract footprint dims
Add series resistor
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