# STD45NF75T4

**STMicroelectronics** · MOSFETs · DPAK

STD45NF75T4 from STMicroelectronics, in a DPAK. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | G | input | Gate. Insulated gate control terminal. Absolute maximum VGS = ±20 V. Typical gate threshold voltage VGS(th) = 2 to 4 V (at ID = 250 µA). Total gate charge Qg ≈ 60 nC typ (80 nC max) at VGS = 0 to 10 V, VDD = 60 V, ID = 40 A. |
| 2 | D | passive | Drain. Also electrically connected to the exposed TAB (thermal pad) of the DPAK package. VDS max = 75 V; continuous ID = 40 A at TC = 25 °C (30 A at TC = 100 °C); pulsed IDM = 160 A. Static RDS(on) = 18 mΩ typ / 24 mΩ max at VGS = 10 V, ID = 20 A. |
| 3 | S | passive | Source. Reference terminal for the MOSFET and anode of the intrinsic body diode. Body-diode forward voltage VSD ≈ 1.5 V max at ISD = 40 A, VGS = 0 V; trr ≈ 120 ns typ, Qrr ≈ 410 nC typ. |
| TAB | D | passive | Exposed metal tab on the back of the DPAK package, internally connected to the drain (pin 2). Used as the primary thermal path to the PCB copper pour; Rthj-case = 1.2 °C/W, Rthj-pcb = 50 °C/W on a 1 in² 2 oz FR-4 board. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | DPAK |
| Category | Transistors/Thyristors |
| Pins | 4 |

## Ordering variants

Same part, different packaging or reel option.

- `STD45NF75T4`

## CAD (KiCad official)

- Symbol: `STD45NF75T4`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: DPAK (KiCad packages3D, STEP)
- 3D model files: `std45nf75t4-etched.step` / `std45nf75t4-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `std45nf75t4.step` / `std45nf75t4.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8601118657359994880) (None pp, sha256 `69571e1b79e3e947`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/std45nf75t4-datasheet.pdf)