# HSU4119

**HUASHUO** · MOSFETs · TO-252

HSU4119 from HUASHUO, 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; gate-source voltage limited to ±20 V, with threshold VGS(th) between -1.0 and -2.5 V. |
| 2 | D | passive | Drain, connected to the exposed tab; drain-source voltage -40 V and continuous drain current -120 A (package limited). |
| 3 | S | passive | Source; continuous source (body diode) current is -120 A max. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HUASHUO |
| 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 | -40 |  |  | V |  | 1 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V |  | 1 |
| Continuous Drain Current | ID | -120 |  |  | A | VGS @ -10V, TC=25℃ | 1 |
| Continuous Drain Current | ID | -90 |  |  | A | VGS @ -10V, TC=100℃ | 1 |
| Pulsed Drain Current | IDM | -480 |  |  | A |  | 1 |
| Single Pulse Avalanche Energy | EAS |  |  | 1250 | mJ | VDD=-40V, VGS=-10V, L=0.5mH, IAS=-70A (note 3) | 1 |
| Avalanche Current | IAS | -70 |  |  | A |  | 1 |
| Total Power Dissipation | PD |  |  | 135 | W | TC=25℃ | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Operating Junction Temperature Range | TJ | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance Junction-ambient | RθJA |  |  | 20 | ℃/W | t≦10S | 1 |
| Thermal Resistance Junction-ambient | RθJA |  |  | 62 | ℃/W | Steady State | 1 |
| Thermal Resistance Junction-case | RθJC |  |  | 1.8 | ℃/W |  | 1 |
| Drain-Source Breakdown Voltage | BVDSS | -40 |  |  | V | VGS=0V, ID=-250uA | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 3.5 | 4 | mΩ | VGS=-10V, ID=-30A | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  | 4.5 | 5.3 | mΩ | VGS=-4.5V, ID=-20A | 2 |
| Gate Threshold Voltage | VGS(th) | -1 |  | -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 |  |  | -100 | uA | VDS=-40V, VGS=0V, TJ=125℃ | 2 |
| Gate-Source Leakage Current | IGSS | -100 |  | 100 | nA | VGS=±20V, VDS=0V | 2 |
| Continuous Source Current | IS |  |  | -120 | A | VG=VD=0V, Force Current | 2 |
| Diode Forward Voltage | VSD |  |  | -1.2 | V | VGS=0V, IS=-20A, TJ=25℃ | 2 |

## CAD (KiCad official)

- Symbol: `HSU4119`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `hsu4119-etched.step` / `hsu4119-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hsu4119.step` / `hsu4119.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HUASHUO datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603363817959411712) (5 pp, sha256 `e051135ba6aebc4a`, retrieved 2026-10-16, 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/hsu4119-datasheet.pdf)