# SM712-HXY

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

SM712-HXY from HXY MOSFET, 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 | 1 | passive | One of the two terminals of the bidirectional ESD protection diode, with a reverse working voltage of 12.0 V max (Pin1 or 2 to Pin3), breakdown of 13.5-16.0 V at 1 mA, and clamping of 18.5-20.0 V at 15 A (8/20 µs). |
| 2 | 2 | passive | The second terminal referenced with Pin 1 in the datasheet ratings, sharing the same 12.0 V max reverse working voltage and 13.5-16.0 V breakdown limits (Pin1 or 2 to Pin3). |
| 3 | 3 | passive | The common terminal of the protection diode, with a reverse working voltage of 7.0 V max (Pin3 to Pin1 or 2), breakdown of 7.5-9.5 V at 1 mA, and clamping of 12.5-14.0 V at 18 A (8/20 µs). |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `SM712-HXY`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `sm712-hxy-etched.step` / `sm712-hxy-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sm712-hxy.step` / `sm712-hxy.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HXY MOSFET datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758131190572699648) (4 pp, sha256 `979d63efe7ab1388`, 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-hxy-datasheet.pdf)