# TPAZ5125-02S.R7G

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

TPAZ5125-02S.R7G 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 | I/O1 | passive | TVS protection line 1, bi-directional diode to pin 3 with 5V reverse working voltage (max) and 15pF typ / 20pF max capacitance to pin 3. |
| 2 | I/O2 | passive | TVS protection line 2, bi-directional diode to pin 3 with 5V reverse working voltage (max) and 15pF typ / 20pF max capacitance to pin 3. |
| 3 | COMMON | passive | Common node shared by both bi-directional TVS diodes of pins 1 and 2 (typically tied to ground/reference), which the datasheet does not label as GND. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `TPAZ5125-02S.R7G`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `tpaz5125-02s-r7g-etched.step` / `tpaz5125-02s-r7g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tpaz5125-02s-r7g.step` / `tpaz5125-02s-r7g.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/8589836000110682112) (4 pp, sha256 `9881577949ef24fd`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/tpaz5125-02s-r7g-datasheet.pdf)