# PESD0603B18

**YFW** · ESD And Surge Protection (TVS/ESD) · 0603

PESD0603B18 from YFW, in a 0603. 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 | 1 | passive | Bidirectional ESD protection terminal connected to the protected signal line; continuous operating voltage 18.0 V max, ±8 kV contact / ±15 kV air per IEC 61000-4-2. |
| 2 | 2 | passive | Second bidirectional ESD protection terminal, normally connected to ground (device is symmetric); continuous operating voltage 18.0 V max. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | 0603 |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `PESD0603B18`
- Footprint: `Diode_SMD:D_0603_1608Metric`
- 3D model: 0603 (KiCad packages3D, STEP)
- 3D model files: `pesd0603b18-etched.step` / `pesd0603b18-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `pesd0603b18.step` / `pesd0603b18.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [YFW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603382866000957440) (4 pp, sha256 `78877e677c1e75d4`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (vision), consensus `claude-opus-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/pesd0603b18-datasheet.pdf)