# P4SMFJ15A

**Leiditech** · TVS · SOD-123FL

P4SMFJ15A from Leiditech, in a SOD-123FL. 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 | Terminal 1 of an unpolarised fuse; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised fuse; either orientation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Leiditech |
| Package | SOD-123FL |
| 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 |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage | VBR | 16.7 |  | 18.5 | V | @ IT = 1 mA | 2 |
| Working Peak Reverse Voltage | VRWM |  | 15 |  | V |  | 2 |
| Maximum Reverse Leakage | IR |  |  | 1 | uA | @ VRWM | 2 |
| Maximum Reverse Surge Current | IPP |  |  | 16.4 | A | 10/1000μs waveform | 2 |
| Maximum Clamping Voltage | VC |  |  | 24.4 | V | @ IPP | 2 |
| Peak power dissipation | PPP |  |  | 400 | W | 10/1000μs waveform, TA=25℃ | 1 |
| Power dissipation on infinite heatsink | PD |  |  | 0.4 | W | TL = 75 °C | 1 |
| Peak forward surge current | IFSM |  |  | 40 | A | 8.3 ms single half sine-wave, unidirectional only | 1 |
| Maximum instantaneous forward voltage | VF |  |  | 5 | V | at 25 A, unidirectional only | 1 |
| Operating junction and storage temperature range | TJ, TSTG | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `P4SMFJ15A`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files: `p4smfj15a-etched.step` / `p4smfj15a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `p4smfj15a.step` / `p4smfj15a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Leiditech datasheet](docs/p4smfj15a-datasheet.pdf) (5 pp, sha256 `8c080e4fab70e30c`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `two-terminal 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/p4smfj15a-datasheet.pdf)