# SET23A03L02

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

SET23A03L02 from Brightking, 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 | LINE 1 | passive | I/O line 1 protected against ESD; 3.3V reverse stand-off voltage (VRWM), 4V min breakdown at 1mA, 5uA max leakage at VR=3.3V. |
| 2 | LINE 2 | passive | I/O line 2 protected against ESD; 3.3V reverse stand-off voltage (VRWM), 4V min breakdown at 1mA, 5uA max leakage at VR=3.3V. |
| 3 | GND | power_in | Common ground reference for the unidirectional protection diodes (pin 3 on the package drawing); in the bidirectional configuration it is left as the unconnected X pin. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `SET23A03L02`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `set23a03l02-etched.step` / `set23a03l02-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `set23a03l02.step` / `set23a03l02.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Brightking datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588906379330899968) (6 pp, sha256 `6337dd1e4473c290`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/set23a03l02-datasheet.pdf)