# SM712X

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

SM712X from Shenzhen JingYang, 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 | Pin1 | bidirectional | Protected data line with TVS clamping to pin 3: 12 V working voltage for pin 1 to pin 3 polarity and 7 V working voltage for pin 3 to pin 1 polarity, with 50 pF typical parasitic capacitance. |
| 2 | Pin2 | bidirectional | Protected data line with TVS clamping to pin 3: 12 V working voltage for pin 2 to pin 3 polarity and 7 V working voltage for pin 3 to pin 2 polarity, with 50 pF typical parasitic capacitance. |
| 3 | Pin3 | passive | Common terminal shared by the two 12 V and two 7 V TVS diode paths on pins 1 and 2; the datasheet does not specify it as a ground or supply pin. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `SM712X`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `sm712x-etched.step` / `sm712x-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sm712x.step` / `sm712x.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shenzhen JingYang datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590904834869063680) (6 pp, sha256 `62b35875f755c660`, 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/sm712x-datasheet.pdf)