# LY712

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

LY712 from Liown, 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 | passive | Data-line TVS terminal referenced to Pin3; for the Pin1-to-Pin3 path the datasheet gives 12V maximum reverse working voltage, 13.3V minimum breakdown at 1mA, and 0.5µA maximum reverse leakage at 12V. |
| 2 | Pin2 | passive | Data-line TVS terminal referenced to Pin3; for the Pin2-to-Pin3 path the datasheet gives the same 12V maximum reverse working voltage, 13.3V minimum breakdown at 1mA, and 0.5µA maximum reverse leakage at 12V. |
| 3 | Pin3 | passive | Common terminal of the TVS pair; for the Pin3-to-Pin1 and Pin3-to-Pin2 paths the datasheet gives 7V maximum reverse working voltage, 7.5V minimum breakdown at 1mA, and 0.5µA maximum reverse leakage at 7V. |

## Key specifications

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

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reverse Working Voltage (Pin1 to Pin3 and Pin2 to Pin3) | VRWM |  |  | 12 | V |  | 2 |
| Breakdown Voltage (Pin1 to Pin3 and Pin2 to Pin3) | VBR | 13.3 |  |  | V | IT = 1mA | 2 |
| Reverse Leakage Current (Pin1 to Pin3 and Pin2 to Pin3) | IR |  |  | 0.5 | µA | VRWM = 12V | 2 |
| Clamping Voltage (Pin1 to Pin3 and Pin2 to Pin3), IPP = 5A (8/20µs) | VC |  |  | 20 | V | IPP = 5A (8/20µs) | 2 |
| Clamping Voltage (Pin1 to Pin3 and Pin2 to Pin3), IPP = 13A (8/20µs) | VC |  |  | 25 | V | IPP = 13A (8/20µs) | 2 |
| Reverse Working Voltage (Pin3 to Pin1 and Pin3 to Pin2) | VRWM |  |  | 7 | V |  | 2 |
| Breakdown Voltage (Pin3 to Pin1 and Pin3 to Pin2) | VBR | 7.5 |  |  | V | IT = 1mA | 2 |
| Reverse Leakage Current (Pin3 to Pin1 and Pin3 to Pin2) | IR |  |  | 0.5 | µA | VRWM = 7V | 2 |
| Clamping Voltage (Pin3 to Pin1 and Pin3 to Pin2), IPP = 5A (8/20µs) | VC |  |  | 14 | V | IPP = 5A (8/20µs) | 2 |
| Clamping Voltage (Pin3 to Pin1 and Pin3 to Pin2), IPP = 13A (8/20µs) | VC |  |  | 16 | V | IPP = 13A (8/20µs) | 2 |
| Peak Pulse Power (8/20µs) | PPP |  |  | 325 | W |  | 2 |
| Peak Pulse Current (8/20µs) | IPP |  |  | 13 | A |  | 2 |
| ESD per IEC 61000−4−2 (Air) | VESD | -30 |  | 30 | kV |  | 2 |
| ESD per IEC 61000−4−2 (Contact) | VESD | -30 |  | 30 | kV |  | 2 |
| Ambient Temperature Range | TA | -55 |  | 125 | ℃ |  | 2 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 2 |

## CAD (KiCad official)

- Symbol: `LY712`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `ly712-etched.step` / `ly712-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ly712.step` / `ly712.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Liown datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603042715563008000) (5 pp, sha256 `c229bb42a3670e84`, retrieved 2026-10-17, 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/ly712-datasheet.pdf)