# FESD05BD5

**FUXINSEMI** · ESD Protection Devices · SOD-523

FESD05BD5 from FUXINSEMI, in a SOD-523. 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 | A1 | passive | Bidirectional TVS terminal; connect to the protected I/O line, with working voltage VR 5V max, breakdown 6.5-8.0V at 1mA, and clamping 10V max at 1A (8/20µs). |
| 2 | A2 | passive | Bidirectional TVS terminal; connect to the protected I/O line or ground, with polarity-independent protection and ESD rating of ±30kV (IEC61000-4-2 air and contact). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | FUXINSEMI |
| Package | SOD-523 |
| Category | TVS/Fuse/Board Level Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `FESD05BD5`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `fesd05bd5-etched.step` / `fesd05bd5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fesd05bd5.step` / `fesd05bd5.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [FUXINSEMI datasheet](docs/fesd05bd5-datasheet.pdf) (3 pp, sha256 `f149a6e8fd8ed156`, retrieved 2026-10-22, 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/fesd05bd5-datasheet.pdf)