# TPAZ5123-01H

**TECH PUBLIC** · ESD Protection Devices · SOD-523

TPAZ5123-01H from TECH PUBLIC, in a SOD-523. 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 | Terminal 1 (bidirectional TVS) | passive | One of the two terminals of the bidirectional TVS diode, rated for a reverse working voltage of 3.3 V max and a peak pulse current of 9 A (8/20 µs). |
| 2 | Terminal 2 (bidirectional TVS) | passive | The other terminal of the bidirectional TVS diode, which clamps across the same ±3.3 V working range as pin 1 and is rated for ESD of ±30 kV contact and air per IEC 61000-4-2. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOD-523 |
| Category | TVS/Fuse/Board Level Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `TPAZ5123-01H`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `tpaz5123-01h-etched.step` / `tpaz5123-01h-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tpaz5123-01h.step` / `tpaz5123-01h.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](docs/tpaz5123-01h-datasheet.pdf) (4 pp, sha256 `bea5ace230322080`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/tpaz5123-01h-datasheet.pdf)