# ST0561D4-P

**TECH PUBLIC** · ESD Protection Devices · DFN1006-2

ST0561D4-P from TECH PUBLIC, in a DFN1006-2. 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 | passive | One of the two terminals of the bidirectional TVS diode, which has a 5 V maximum reverse working voltage (VRWM) and a 5.6 V minimum breakdown voltage (VBR) at 1 mA. |
| 2 | Terminal 2 | passive | The other terminal of the bidirectional TVS diode, which clamps to 10 V maximum at Ipp = 8 A (8/20 µs pulse) and has 15 pF typical junction capacitance at VR = 0 V, f = 1 MHz. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | DFN1006-2 |
| Category | TVS/Fuse/Board Level Protection |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `ST0561D4-P`
- Footprint: `Diode_SMD:D_SOD-882`
- 3D model: DFN1006-2 (KiCad packages3D, STEP)
- 3D model files: `st0561d4-p-etched.step` / `st0561d4-p-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `st0561d4-p.step` / `st0561d4-p.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](docs/st0561d4-p-datasheet.pdf) (4 pp, sha256 `0049a45660b29057`, 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/st0561d4-p-datasheet.pdf)