# TPSL12T1G

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

TPSL12T1G from TECH PUBLIC, 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 | Protected line terminal (cathode side of the TVS diode) with 12V reverse working voltage and 1 pF typical junction capacitance to pin 2; the datasheet does not name it. |
| 2 | 2 | passive | Second diode terminal (anode side of the steering diode) with 1 pF typical junction capacitance measured from pin 1 to pin 2; the datasheet does not name it. |
| 3 | NC | unconnected | Not connected (N.C.) as shown in the pin configuration diagram. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `TPSL12T1G`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `tpsl12t1g-etched.step` / `tpsl12t1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tpsl12t1g.step` / `tpsl12t1g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590931218588516352) (4 pp, sha256 `6629c4c40a0d753a`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/tpsl12t1g-datasheet.pdf)