# SPD9103W

**TECH PUBLIC** · MOSFETs · SOD-323

SPD9103W from TECH PUBLIC, in a SOD-323. 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 | 1 | passive | Pin 1 is one terminal of the bidirectional TVS clamp, tied to the top node of the internal diode network; the datasheet gives a Nominal Reverse Working Voltage (VRWM) of 3.3 V max and a Breakdown Voltage (VBR) of 4 V min at IT = 1 mA. |
| 2 | 2 | passive | Pin 2 is the other terminal of the bidirectional TVS clamp, tied to the bottom node of the internal diode network; the datasheet gives a Junction Capacitance of 1 pF typical at VR = 0 V, f = 1 MHz and a Clamping Voltage of 9 V max at IPP = 1 A (8/20 µs). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOD-323 |
| Category | Triode/MOS Tube/Transistor |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `SPD9103W`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `spd9103w-etched.step` / `spd9103w-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `spd9103w.step` / `spd9103w.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TECH PUBLIC datasheet](docs/spd9103w-datasheet.pdf) (4 pp, sha256 `9c39b7c2f6ea53fb`, retrieved 2026-11-04, 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/spd9103w-datasheet.pdf)