# ESD5VFBD523

**YFW** · ESD And Surge Protection (TVS/ESD) · SOD-523

ESD5VFBD523 from YFW, 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 | 1 | passive | Terminal 1 of the bidirectional TVS, which protects one I/O or power line with a reverse stand-off voltage (VRWM) of 5.0 V max, breakdown 5.6 V min to 7.4 V max at 1 mA, clamping 9.5 V max at IPP = 8 A (tP = 8/20 µs), and 100 W peak pulse power. |
| 2 | 2 | passive | Terminal 2 of the bidirectional TVS, which has the same limits as pin 1: VRWM 5.0 V max, breakdown 5.6 V min to 7.4 V max at 1 mA, clamping 9.5 V max at 8 A, and ESD protection rated ±30 kV contact and air per IEC 61000-4-2. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | SOD-523 |
| Category | Circuit Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `ESD5VFBD523`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `esd5vfbd523-etched.step` / `esd5vfbd523-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esd5vfbd523.step` / `esd5vfbd523.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/8782647352530489344) (5 pp, sha256 `93d6b1dbe9435342`, retrieved 2026-10-15, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/esd5vfbd523-datasheet.pdf)