# RS25N50W

**REASUNOS** · MOSFETs · TO-247

RS25N50W from REASUNOS, in a TO-247. 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, with a gate-to-source voltage limit of ±30 V and a threshold voltage of 3 V to 4 V at VDS=VGS, ID=250 µA. |
| 2 | D | passive | Drain, rated for 500 V drain-to-source voltage and 25 A continuous drain current at TC=25℃ (100 A pulsed). |
| 3 | S | passive | Source, which carries the 25 A continuous body-diode current (IS) and has a maximum diode forward voltage of 1.4 V at IS=12.5 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | REASUNOS |
| Package | TO-247 |
| Category | Triode/MOS Tube/Transistor |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `RS25N50W`
- Footprint: `Package_TO_SOT_THT:TO-247-3_Vertical`
- 3D model: TO-247 (KiCad packages3D, STEP)
- 3D model files: `rs25n50w-etched.step` / `rs25n50w-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rs25n50w.step` / `rs25n50w.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [REASUNOS datasheet](docs/rs25n50w-datasheet.pdf) (8 pp, sha256 `bd0aa89d45bcfc4f`, 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/rs25n50w-datasheet.pdf)