# TPZ12VCS3

**TECH PUBLIC** · Zener Diodes · SOT-23

TPZ12VCS3 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 | A | passive | Zener anode, drawn in the SOT23 pin diagram as the bottom end of the diode; the TPZ12VCS3 has Vz 11.40 V min, 12.00 V nom and 12.70 V max at IZT = 5 mA. |
| 2 | NC | unconnected | Pin 2 is shown in the SOT23 pin diagram with no internal connection to the zener diode. |
| 3 | K | passive | Zener cathode, drawn in the SOT23 pin diagram as joined to the top (bar) end of the diode; the device dissipates 350 mW maximum. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `TPZ12VCS3`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `tpz12vcs3-etched.step` / `tpz12vcs3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tpz12vcs3.step` / `tpz12vcs3.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/8604450535106240512) (5 pp, sha256 `842f2d3a3a70a433`, retrieved 2026-10-19, 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/tpz12vcs3-datasheet.pdf)