# P4SOD43AX

**WeEn Semiconductors** · ESD And Surge Protection (TVS/ESD) · SOD-123F

P4SOD43AX from WeEn Semiconductors, in a SOD-123F. 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | WeEn Semiconductors |
| Package | SOD-123F |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown voltage | VBR | 47.8 |  | 52.8 | V | @ IT = 1 mA, Tj = 25 °C | 2 |
| Maximum clamping voltage | VC |  |  | 69.4 | V | @ Ipp = 5.8 A | 2 |
| Maximum peak pulse current | Ipp |  |  | 5.8 | A |  | 2 |
| Maximum reverse leakage | IR |  |  | 1 | μA | @ VR = 43 V | 2 |
| Reverse stand-off voltage | VR |  | 43 |  | V |  | 2 |
| Test current | IT |  | 1 |  | mA |  | 2 |
| Peak pulse power | PPPM |  |  | 400 | W | 10/1000 μs current waveform (IEC 61643-321) | 1 |
| Steady state power dissipation | PM(AV) |  |  | 1 | W | on infinite heatsink at Ta = 50 °C | 1 |
| Storage temperature range | Tstg | -65 |  | 150 | °C |  | 1 |
| Operating temperature range | Tj | -65 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `P4SOD43AX`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123F (KiCad packages3D, STEP)
- 3D model files: `p4sod43ax-etched.step` / `p4sod43ax-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `p4sod43ax.step` / `p4sod43ax.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [WeEn Semiconductors datasheet](docs/p4sod43ax-datasheet.pdf) (7 pp, sha256 `46654489b3f90ac2`, retrieved 2026-10-23, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/p4sod43ax-datasheet.pdf)