# STU417S

**MSKSEMI** · MOSFETs · TO-252

STU417S from MSKSEMI, 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 of the P-channel MOSFET, with a maximum gate-source voltage of ±20 V and a gate threshold of -1.0 to -2.5 V. |
| 2 | D | passive | Drain, which is the middle lead and the exposed tab, rated for VDS of -40 V and continuous ID of -50 A at TC=25°C. |
| 3 | S | passive | Source of the P-channel MOSFET, with body-diode continuous source current of -50 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| 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 |  | 2 |
| Gate-Source Voltage | VGS | -20 |  | 20 | V |  | 2 |
| Continuous Drain Current | ID |  |  | -50 | A | TC=25℃, VGS @ 10V | 2 |
| Continuous Drain Current | ID |  |  | -31 | A | TC=100℃, VGS @ 10V | 2 |
| Pulsed Drain Current | IDM |  |  | -200 | A |  | 2 |
| Total Power Dissipation | PD |  |  | 55 | W | TC=25℃ | 2 |
| Storage Temperature Range | TSTG | -55 |  | 150 | ℃ |  | 2 |
| Operating Junction Temperature Range | TJ | -55 |  | 150 | ℃ |  | 2 |
| Thermal Resistance Junction-ambient | RθJA |  |  | 61 | ℃/W |  | 2 |
| Thermal Resistance Junction-Case | RθJC |  |  | 2.27 | ℃/W |  | 2 |
| Drain-Source Breakdown Voltage | V(BR)DSS | -40 |  |  | V | VGS = 0V, ID = -250µA | 3 |
| Gate-body Leakage current | IGSS | -100 |  | 100 | nA | VDS = 0V, VGS = ±20V | 3 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 1 | μA | TJ=25°C, VDS = -40V, VGS = 0V | 3 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 5 | μA | TJ=100°C, VDS = -40V, VGS = 0V | 3 |
| Gate-Threshold Voltage | VGS(th) | -1 | -1.6 | -2.5 | V | VDS = VGS, ID = -250µA | 3 |
| Drain-Source On-Resistance | RDS(on) |  | 10.5 | 13 | mΩ | VGS = -10V, ID = -16A | 3 |
| Drain-Source On-Resistance | RDS(on) |  | 14.2 | 20 | mΩ | VGS = -4.5V, ID = -12A | 3 |
| Diode Forward Voltage | VSD |  |  | -1.2 | V | IS = -1A, VGS = 0V | 3 |
| Continuous Source Current | IS |  |  | -50 | A | TC=25°C | 3 |

## CAD (KiCad official)

- Symbol: `STU417S`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `stu417s-etched.step` / `stu417s-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `stu417s.step` / `stu417s.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MSKSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8555434954255015936) (8 pp, sha256 `618b17e3c6c2865c`, 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/stu417s-datasheet.pdf)