# WSR170N04G

**Winsok Semicon** · MOSFETs · TO-220AB

WSR170N04G from Winsok Semicon, in a TO-220AB. 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 control input, with a maximum gate-source voltage of ±20 V and a gate threshold of 1.2 V min to 2.5 V max. |
| 2 | D | passive | Drain, which is also connected to the metal tab, rated for a maximum drain-source voltage of 40 V and a continuous current of 170 A at TC=25℃. |
| 3 | S | passive | Source terminal, carrying up to 170 A continuous at TC=25℃, with the body diode between source and drain. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Winsok Semicon |
| Package | TO-220AB |
| Category | Triode/MOS Tube/Transistor |
| 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 Breakdown Voltage | BVDSS | 40 |  |  | V | VGS=0V , ID=250uA | 2 |
| Gate Threshold Voltage | VGS(th) | 1.2 | 1.8 | 2.5 | V | VGS=VDS , ID =250uA | 2 |
| Drain-Source Leakage Current | IDSS |  |  | 1 | uA | VDS=40V , VGS=0V , TJ=25℃ | 2 |
| Drain-Source Leakage Current | IDSS |  |  | 5 | uA | VDS=40V , VGS=0V , TJ=55℃ | 2 |
| Gate-Source Leakage Current | IGSS | -100 |  | 100 | nA | VGS=±20V , VDS=0V | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 1.9 | 3 | mΩ | VGS=10V , ID=20A | 2 |
| Continuous Source Current | IS |  |  | 170 | A | VG=VD=0V , Force Current | 2 |
| Pulsed Source Current | ISM |  |  | 800 | A | VG=VD=0V , Force Current | 2 |
| Diode Forward Voltage | VSD |  |  | 1.2 | V | VGS=0V , IS=1A , TJ=25℃ | 2 |
| Drain-Source Voltage | VDS |  |  | 40 | V |  | 1 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V |  | 1 |
| Continuous Drain Current | ID@TC=25℃ |  |  | 170 | A | VGS @ 10V | 1 |
| Continuous Drain Current | ID@TC=100℃ |  |  | 135 | A | VGS @ 10V | 1 |
| Pulsed Drain Current | IDM |  |  | 800 | A |  | 1 |
| Single Pulse Avalanche Energy | EAS |  |  | 450 | mJ |  | 1 |
| Total Power Dissipation | PD@TC=25℃ |  |  | 185 | W |  | 1 |
| Operating Junction Temperature Range | TJ | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance Junction-Ambient | RθJA |  |  | 50 | ℃/W |  | 1 |
| Thermal Resistance Junction-Case | RθJC |  |  | 0.7 | ℃/W |  | 1 |
| BVDSS Temperature Coefficient | △BVDSS/△TJ |  | 0.057 |  | V/℃ | Reference to 25℃ , ID=1mA | 2 |
| VGS(th) Temperature Coefficient | △VGS(th) |  | -5.68 |  | mV/℃ |  | 2 |
| Gate Resistance | Rg |  | 1 |  | Ω | VDS=0V , VGS=0V , f=1MHz | 2 |
| Total Gate Charge (4.5V) | Qg |  | 45 |  | nC | VDS=20V , VGS=10V , ID=20A | 2 |
| Gate-Source Charge | Qgs |  | 12 |  | nC | VDS=20V , VGS=10V , ID=20A | 2 |
| Gate-Drain Charge | Qgd |  | 18 |  | nC | VDS=20V , VGS=10V , ID=20A | 2 |
| Turn-On Delay Time | Td(on) |  | 19 |  | ns | VDS=20V , VGS=10V , ID=20A , Rg=1Ω | 2 |
| Rise Time | Tr |  | 10 |  | ns | VDS=20V , VGS=10V , ID=20A , Rg=1Ω | 2 |
| Turn-Off Delay Time | Td(off) |  | 59 |  | ns | VDS=20V , VGS=10V , ID=20A , Rg=1Ω | 2 |
| Fall Time | Tf |  | 32 |  | ns | VDS=20V , VGS=10V , ID=20A , Rg=1Ω | 2 |
| Input Capacitance | Ciss |  | 3950 |  | pF | VDS=20V , VGS=0V , f=1MHz | 2 |
| Output Capacitance | Coss |  | 1120 |  | pF | VDS=20V , VGS=0V , f=1MHz | 2 |
| Reverse Transfer Capacitance | Crss |  | 98 |  | pF | VDS=20V , VGS=0V , f=1MHz | 2 |
| Reverse Recovery Time | trr |  | 35 |  | nS | IF=20A ,dI/dt=100A/µs,TJ=25℃ | 2 |
| Reverse Recovery Charge | Qrr |  | 56 |  | nC | IF=20A ,dI/dt=100A/µs,TJ=25℃ | 2 |

## CAD (KiCad official)

- Symbol: `WSR170N04G`
- Footprint: `Package_TO_SOT_THT:TO-220-3_Vertical`
- 3D model: TO-220AB (KiCad packages3D, STEP)
- 3D model files: `wsr170n04g-etched.step` / `wsr170n04g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `wsr170n04g.step` / `wsr170n04g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Winsok Semicon datasheet](docs/wsr170n04g-datasheet.pdf) (5 pp, sha256 `eef4fbd7f94d9837`, retrieved 2026-10-27, 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/wsr170n04g-datasheet.pdf)