# WPE12VD3ULA

**WPMtek(Wei Pan Microelectronics)** · ESD Protection Devices · SOD-323

WPE12VD3ULA from WPMtek(Wei Pan Microelectronics), 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 | One terminal of the 1-line bi-directional TVS diode, which protects one data or power line with a 12V reverse working voltage (VRWM) and 1pF typical junction capacitance. |
| 2 | 2 | passive | Other terminal of the 1-line bi-directional TVS diode, which protects one data or power line with a 12V reverse working voltage (VRWM) and 1pF typical junction capacitance. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | WPMtek(Wei Pan Microelectronics) |
| Package | SOD-323 |
| Category | TVS/Fuse/Board Level 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 |
|---|---|---|---|---|---|---|---|
| Peak Pulse Power (8/20µs) | Ppk |  |  | 350 | W | 8/20µs | 2 |
| Peak Pulse Current (8/20µs) | IPP |  |  | 12 | A | 8/20µs | 2 |
| ESD per IEC 61000−4−2 (Air) | VESD | -30 |  | 30 | kV |  | 2 |
| ESD per IEC 61000−4−2 (Contact) | VESD | -30 |  | 30 | kV |  | 2 |
| Operating Temperature Range | TJ | -55 |  | 125 | °C |  | 2 |
| Storage Temperature Range | Tstg | -55 |  | 150 | °C |  | 2 |
| Reverse Working Voltage | VRWM |  | 12 |  | V |  | 2 |
| Breakdown Voltage | VBR |  | 13.3 |  | V | IT = 1mA | 2 |
| Reverse Leakage Current | IR |  | 0.2 |  | μA | VRWM = 12V | 2 |
| Clamping Voltage | VC |  | 18 |  | V | IPP = 1A (8 x 20µs pulse) | 2 |
| Clamping Voltage | VC |  | 29 |  | V | IPP = 12A (8 x 20µs pulse) | 2 |
| Junction Capacitance | CJ |  | 1 |  | pF | VR = 0V, f = 1MHz | 2 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin | • Lead Finish: Matte Tin • Case Material: “Green” Molding Compound. | 1 |

## CAD (KiCad official)

- Symbol: `WPE12VD3ULA`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323 (KiCad packages3D, STEP)
- 3D model files: `wpe12vd3ula-etched.step` / `wpe12vd3ula-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `wpe12vd3ula.step` / `wpe12vd3ula.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [WPMtek(Wei Pan Microelectronics) datasheet](docs/wpe12vd3ula-datasheet.pdf) (4 pp, sha256 `891f52b4c6c3980e`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/wpe12vd3ula-datasheet.pdf)