# WSF4N65

**Winsok Semicon** · MOSFETs · TO-252

WSF4N65 from Winsok Semicon, in a TO-252. 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 | G | input | Gate; controls the channel, with VGS rated at ±30 V maximum, VGS(th) 2.0 to 4.0 V and IGSS of ±100 nA maximum at VGS=±30 V. |
| 2 | D | passive | Drain, also the exposed tab; rated for VDS of 650 V and continuous ID of 4 A at TC=25℃ (16 A pulsed). |
| 3 | S | passive | Source; the body diode runs from source to drain, with continuous source current IS of 4 A maximum and VSD of 1.4 V maximum. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Winsok Semicon |
| Package | TO-252 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## 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 |  |  | 650 | V |  | 1 |
| Gate-Source Voltage | VGS | -30 |  | 30 | V |  | 1 |
| Continuous Drain Current, VGS @ 10V (TC=25℃) | ID |  |  | 4 | A | TC=25℃ | 1 |
| Continuous Drain Current, VGS @ 10V (TC=100℃) | ID |  |  | 2.5 | A | TC=100℃ | 1 |
| Pulsed Drain Current | IDM |  |  | 16 | A |  | 1 |
| Single Pulse Avalanche Energy | EAS |  |  | 128 | mJ |  | 1 |
| Total Power Dissipation | PD |  |  | 77 | W |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Operating Junction Temperature Range | TJ | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance Junction-ambient | RθJA |  |  | 62.5 | ℃/W |  | 1 |
| Thermal Resistance Junction-Case | RθJC |  |  | 1.62 | ℃/W |  | 1 |
| Drain-Source Breakdown Voltage | BVDSS | 650 |  |  | V | VGS=0V, ID=250uA | 2 |
| BVDSS Temperature Coefficient | △BVDSS/△TJ |  | 0.6 |  | V/℃ | Reference to 25℃, ID=250uA | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 2.6 | 3 | Ω | VGS=10V, ID=3.5A | 2 |
| Gate Threshold Voltage | VGS(th) | 2 | 3 | 4 | V | VGS=VDS, ID=250uA | 2 |
| VGS(th) Temperature Coefficient | △VGS(th) |  | -4.57 |  | mV/℃ |  | 2 |
| Drain-Source Leakage Current | IDSS |  |  | 1 | uA | VDS=650V, VGS=0V, TJ=25℃ | 2 |
| Drain-Source Leakage Current | IDSS |  |  | 10 | uA | VDS=520V, VGS=0V, TJ=55℃ | 2 |
| Gate-Source Leakage Current | IGSS | -100 |  | 100 | nA | VGS=±30V, VDS=0V | 2 |
| Forward Transconductance | gfs |  | 5 |  | S | VDS=40V, ID=3.5A | 2 |
| Total Gate Charge (10V) | Qg |  | 10.2 |  | nC | VDS=520V, VGS=10V, ID=7A | 2 |
| Gate-Source Charge | Qgs |  | 2.3 |  | nC |  | 2 |
| Gate-Drain Charge | Qgd |  | 2.1 |  | nC |  | 2 |
| Turn-On Delay Time | Td(on) |  | 15.5 |  | ns | VDD=300V, VGS=10V, RG=25Ω, ID=10A | 2 |
| Rise Time | Tr |  | 13 |  | ns |  | 2 |
| Turn-Off Delay Time | Td(off) |  | 40 |  | ns |  | 2 |
| Fall Time | Tf |  | 16 |  | ns |  | 2 |
| Input Capacitance | Ciss |  | 550 |  | pF | VDS=25V, VGS=0V, f=1MHz | 2 |
| Output Capacitance | Coss |  | 46 |  | pF |  | 2 |
| Reverse Transfer Capacitance | Crss |  | 2.3 |  | pF |  | 2 |
| Continuous Source Current | IS |  |  | 4 | A | VG=VD=0V, Force Current | 2 |
| Pulsed Source Current | ISM |  |  | 16 | A |  | 2 |
| Diode Forward Voltage | VSD |  |  | 1.4 | V | VGS=0V, IS=7A, TJ=25℃ | 2 |
| Reverse Recovery Time | trr |  | 454 |  | nS | IF=7A, dI/dt=40A/µs, TJ=25℃ | 2 |
| Reverse Recovery Charge | Qrr |  | 2076 |  | nC |  | 2 |

## CAD (KiCad official)

- Symbol: `WSF4N65`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `wsf4n65-etched.step` / `wsf4n65-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `wsf4n65.step` / `wsf4n65.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/8590454441209204736) (6 pp, sha256 `ff1ab2c0eb988c66`, retrieved 2026-10-09, 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/wsf4n65-datasheet.pdf)