# BESD12VD5

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

BESD12VD5 from BORN, 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |

## Key specifications

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

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Junction Temperature | TJ | -55 |  | 150 | ℃ |  | 2 |
| Storage Temperature | Tstg | -55 |  | 150 | ℃ |  | 2 |
| Peak Pulse Power | PPP |  |  | 350 | Watts | tp =8/20μs | 2 |
| Peak Pulse Current | Ipp |  |  | 10 | A | tp =8/20μs (note1) | 2 |
| ESD per IEC 61000-4-2 (Air) | VESD |  |  | 15 | kV | IEC 61000-4-2 (Air) | 2 |
| ESD per IEC 61000-4-2 (Contact) | VESD |  |  | 8 | kV | IEC 61000-4-2 (Contact) | 2 |
| Lead Soldering Temperature | TL |  |  | 260 | ℃ | 10 seconds | 2 |
| Reverse Stand-Off Voltage | VRWM |  | 12 |  | V |  | 2 |
| Reverse Breakdown Voltage | VBR |  | 13.3 |  | V | IT=1mA | 2 |
| Reverse Leakage Current | IR |  | 1 |  | uA | VRWM=12V,T=25℃ | 2 |
| Clamping Voltage | VC |  | 35 |  | V | IPP=10A,tp=8/20μs | 2 |
| Junction Capacitance | Cj |  | 55 |  | pF | VR = 0V, f = 1MHz | 2 |

## CAD (KiCad official)

- Symbol: `BESD12VD5`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `besd12vd5-etched.step` / `besd12vd5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `besd12vd5.step` / `besd12vd5.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [BORN datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590208794194960384) (4 pp, sha256 `3da42810d95bc813`, retrieved 2026-10-15, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/besd12vd5-datasheet.pdf)