# BST23C712V

**BORN** · ESD And Surge Protection (TVS/ESD) · SOT-23

BST23C712V from BORN, in a SOT-23. 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 | I/O1 | bidirectional | Connected to one RS-485 differential data line; the internal TVS has a 12 V reverse stand-off (working) voltage and clamps positive spikes above 12 V and negative spikes below -7 V. |
| 2 | I/O2 | bidirectional | Connected to the other RS-485 differential data line; the internal TVS has a 12 V reverse stand-off (working) voltage and clamps positive spikes above 12 V and negative spikes below -7 V. |
| 3 | GND | power_in | Ground pin with a 7 V TVS working voltage, connected to ground in the RS-485 application, providing the negative-side (-7 V) protection path for pins 1 and 2. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BORN |
| Package | SOT-23 |
| Category | Circuit Protection |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `BST23C712V`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bst23c712v-etched.step` / `bst23c712v-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bst23c712v.step` / `bst23c712v.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/8586187648876613632) (5 pp, sha256 `6a810af03cec2d0c`, retrieved 2026-10-09, 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/bst23c712v-datasheet.pdf)