# PSOT03C-LF-T7

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

PSOT03C-LF-T7 from ProTek Devices, 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 TVS line terminals of the bidirectional PSOT03C, with per-line limits of 3.3 V rated stand-off, 4.0 V minimum breakdown at 1 mA, and 10.9 V clamping at 43 A (8/20 µs). |
| 2 | 2 | passive | One of the two TVS line terminals of the bidirectional PSOT03C, with per-line limits of 3.3 V rated stand-off, 4.0 V minimum breakdown at 1 mA, and 10.9 V clamping at 43 A (8/20 µs). |
| 3 | 3 | passive | Third SOT-23 terminal of the TVS array; the datasheet designates pin 3 as the cathode for unidirectional devices only, so its role on the bidirectional PSOT03C is not stated. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `PSOT03C-LF-T7`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `psot03c-lf-t7-etched.step` / `psot03c-lf-t7-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `psot03c-lf-t7.step` / `psot03c-lf-t7.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ProTek Devices datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586191622829199360) (8 pp, sha256 `8dedaa93ff7eee7c`, 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/psot03c-lf-t7-datasheet.pdf)