# TPAZC199-04S

**TECH PUBLIC** · ESD And Surge Protection (TVS/ESD) · SOT-23-6

TPAZC199-04S from TECH PUBLIC, in a SOT-23-6. 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 | IO1 | passive | I/O protected data line 1 (Note 1: I/O pins are 1, 3, 4 and 6); reverse working voltage 5V max to ground, 0.3pF typ between I/O pins. |
| 2 | GND | power_in | Ground reference pin connected to the TVS diode in the center of the schematic; I/O pins are rated to this pin with VRWM 5V max. |
| 3 | IO2 | passive | I/O protected data line (Note 1: I/O pins are 1, 3, 4 and 6); reverse working voltage 5V max to ground, 0.8pF max to ground. |
| 4 | IO3 | passive | I/O protected data line (Note 1: I/O pins are 1, 3, 4 and 6); clamping voltage 15V max at IPP=1A (8x20µs). |
| 5 | VCC | power_in | Center pin of the schematic connected to the TVS diode cathode, which the features list calls the power line protected; the datasheet does not name it explicitly. |
| 6 | IO4 | passive | I/O protected data line (Note 1: I/O pins are 1, 3, 4 and 6); clamping voltage 20V max at IPP=4A (8x20µs). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-23-6 |
| Category | Circuit Protection |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `TPAZC199-04S`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `tpazc199-04s-etched.step` / `tpazc199-04s-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tpazc199-04s.step` / `tpazc199-04s.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/8588886821606461440) (4 pp, sha256 `983759af66b0b992`, 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/tpazc199-04s-datasheet.pdf)