# SM712-N

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

SM712-N 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 | Data-line pin with a 12 V TVS working voltage, protecting the transceiver input from positive transient spikes greater than 12 V and negative spikes greater than 7 V (per the application information). |
| 2 | I/O2 | bidirectional | Data-line pin with a 12 V TVS working voltage, protecting the transceiver input from positive transient spikes greater than 12 V and negative spikes greater than 7 V (per the application information). |
| 3 | GND | power_in | Ground pin with a 7 V TVS working voltage, connected to ground in the RS-485 application circuit. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `SM712-N`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `sm712-n-etched.step` / `sm712-n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sm712-n.step` / `sm712-n.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/8586201470777626624) (5 pp, sha256 `0f4bb14691dcd3d1`, 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/sm712-n-datasheet.pdf)