# SPD9105W

**UMW** · ESD And Surge Protection (TVS/ESD) · SOD-323

SPD9105W from UMW, 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 | I/O 1 | passive | Bi-directional line protection terminal with 5V max stand-off (VRWM), 5.6V min breakdown at 1mA, and ESD protection up to ±30kV contact discharge per IEC61000-4-2. |
| 2 | I/O 2 | passive | Bi-directional line protection terminal with 5V max stand-off (VRWM), 1pF typ junction capacitance I/O to I/O, and 20A (8/20µs) peak pulse current capability. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOD-323 |
| Category | Circuit Protection |
| Pins | 2 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reverse maximum working voltage | VRWM |  |  | 5 | V |  | 3 |
| Reverse leakage current | IR |  | 0.1 | 100 | nA | VRWM=5V | 3 |
| Reverse breakdown voltage | V(BR) | 5.6 |  |  | V | IT=1mA | 3 |
| Clamping voltage | VCL |  |  | 9 | V | IPP=1A, tp=8/20μs | 3 |
| Clamping voltage | VCL |  |  | 11 | V | IPP=5A, tp=8/20μs | 3 |
| Clamping voltage | VCL |  |  | 18 | V | IPP=20A, tp=8/20μs | 3 |
| Junction capacitance | CJ |  | 1 | 1.5 | pF | VR=0V, f=1MHz, I/O to I/O | 3 |
| Peak pulse power | PPK |  |  | 360 | W | tp=8/20µs, TA=25°C | 2 |
| Peak pulse current | IPP |  |  | 20 | A | tp=8/20µs, TA=25°C | 2 |
| ESD air discharge | VESD | -30 |  | 30 | kV | IEC61000-4-2 air discharge | 2 |
| ESD contact discharge | VESD | -30 |  | 30 | kV | IEC61000-4-2 contact discharge | 2 |
| Junction temperature | TJ |  |  | 125 | °C |  | 2 |
| Operating temperature | TOP | -40 |  | 85 | °C |  | 2 |
| Lead temperature | TL |  |  | 260 | °C |  | 2 |
| Storage temperature | TSTG | -55 |  | 150 | °C |  | 2 |

## CAD (KiCad official)

- Symbol: `SPD9105W`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `spd9105w-etched.step` / `spd9105w-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `spd9105w.step` / `spd9105w.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [UMW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8755887124795138048) (8 pp, sha256 `6e7d1a4043c5ca0a`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-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/spd9105w-datasheet.pdf)