# WSP4099

**Winsok Semicon** · MOSFETs · SOP-8

WSP4099 from Winsok Semicon, in a SOP-8. 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 | S1 | passive | Source of P-channel MOSFET 1; drain-source voltage rated -40 V, continuous drain current -6.5 A at VGS=-10V. |
| 2 | G1 | input | Gate of P-channel MOSFET 1; gate-source voltage rating ±20 V, threshold -1.5 to -2.5 V. |
| 3 | S2 | passive | Source of P-channel MOSFET 2; drain-source voltage rated -40 V, continuous drain current -6.5 A at VGS=-10V. |
| 4 | G2 | input | Gate of P-channel MOSFET 2; gate-source voltage rating ±20 V, threshold -1.5 to -2.5 V. |
| 5 | D2 | passive | Drain of P-channel MOSFET 2, tied internally with pin 6; pulsed drain current -22 A. |
| 6 | D2 | passive | Drain of P-channel MOSFET 2, tied internally with pin 5; pulsed drain current -22 A. |
| 7 | D1 | passive | Drain of P-channel MOSFET 1, tied internally with pin 8; pulsed drain current -22 A. |
| 8 | D1 | passive | Drain of P-channel MOSFET 1, tied internally with pin 7; pulsed drain current -22 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Winsok Semicon |
| Package | SOP-8 |
| Category | Transistors/Thyristors |
| Pins | 8 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Drain-Source Voltage | VDS |  |  | -40 | V |  | 1 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V |  | 1 |
| Continuous Drain Current, -VGS @ -10V (TC=25℃) | ID@TC=25℃ |  |  | -6.5 | A | -VGS @ -10V | 1 |
| Continuous Drain Current, -VGS @ -10V (TC=100℃) | ID@TC=100℃ |  |  | -4.5 | A | -VGS @ -10V | 1 |
| Pulsed Drain Current | IDM |  |  | -22 | A |  | 1 |
| Single Pulse Avalanche Energy | EAS |  |  | 25 | mJ |  | 1 |
| Avalanche Current | IAS |  |  | -10 | A |  | 1 |
| Total Power Dissipation (TC=25℃) | PD |  |  | 2 | W | TC=25℃ | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Operating Junction Temperature Range | TJ | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance Junction-Ambient | RθJA |  |  | 110 | ℃/W | Surface mounted on 1 inch2 FR-4 board, 2OZ copper, t<10sec (note 1) | 1 |
| Thermal Resistance Junction-Case | RθJC |  |  | 50 | ℃/W | Surface mounted on 1 inch2 FR-4 board, 2OZ copper, t<10sec (note 1) | 1 |
| Drain-Source Breakdown Voltage | BVDSS | -40 |  |  | V | VGS=0V, ID=-250uA | 2 |
| Gate Threshold Voltage | VGS(th) | -1.5 | -2 | -2.5 | V |  | 2 |
| Drain-Source Leakage Current (TJ=25℃) | IDSS |  |  | 1 | uA | VDS=-32V, VGS=0V, TJ=25℃ | 2 |
| Drain-Source Leakage Current (TJ=55℃) | IDSS |  |  | 5 | uA | VDS=-32V, VGS=0V, TJ=55℃ | 2 |
| Gate-Source Leakage Current | IGSS | -100 |  | 100 | nA | VGS=±20V, VDS=0V | 2 |
| Static Drain-Source On-Resistance (VGS=-10V) | RDS(ON) |  | 30 | 38 | mΩ | VGS=-10V, ID=-6.5A | 2 |
| Static Drain-Source On-Resistance (VGS=-4.5V) | RDS(ON) |  | 46 | 62 | mΩ | VGS=-4.5V, ID=-4.5A | 2 |
| Single Pulse Avalanche Energy (guaranteed) | EAS | 20 |  |  | mJ | VDD=-25V, L=0.5mH, IAS=-10A | 2 |
| Continuous Source Current | IS |  |  | -2 | A |  | 2 |
| Pulsed Source Current | ISM |  |  | -22 | A | VG=VD=0V, Force Current | 2 |
| Diode Forward Voltage | VSD |  |  | -1 | V | VGS=0V, IS=-1A, TJ=25℃ | 2 |

## CAD (KiCad official)

- Symbol: `WSP4099`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `wsp4099-etched.step` / `wsp4099-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `wsp4099.step` / `wsp4099.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Winsok Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586197516501602304) (5 pp, sha256 `064ab3b32cd9fe42`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+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/wsp4099-datasheet.pdf)