# ESD5311N-2

**WILLSEMI Will Semicon** · ESD And Surge Protection (TVS/ESD) · DFN1006-2L

ESD5311N-2 from WILLSEMI Will Semicon, in a DFN1006-2L. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | Pin1 | bidirectional | Protected line pin of the bi-directional TVS; the datasheet rates each line for ±20kV contact discharge per IEC61000-4-2 and 4A peak pulse current (8/20μs) per IEC61000-4-5, with reverse working voltage VRWM of 5.0V and junction capacitance of 0.25pF typ. to GND. |
| 2 | Pin2 | bidirectional | Protected line pin of the bi-directional TVS; the datasheet rates each line for ±20kV contact discharge per IEC61000-4-2 and 4A peak pulse current (8/20μs) per IEC61000-4-5, with reverse working voltage VRWM of 5.0V and junction capacitance of 0.25pF typ. to GND. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | WILLSEMI Will Semicon |
| Package | DFN1006-2L |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `ESD5311N-2`
- Footprint: `Diode_SMD:D_SOD-882`
- 3D model: DFN1006-2L (KiCad packages3D, STEP)
- 3D model files: `esd5311n-2-etched.step` / `esd5311n-2-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esd5311n-2.step` / `esd5311n-2.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [WILLSEMI Will Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588886667491495936) (5 pp, sha256 `e10fbf07e793804a`, retrieved 2026-10-12, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/esd5311n-2-datasheet.pdf)