# OSD3N90

**OSEN** · MOSFETs · TO-252

OSD3N90 from OSEN, 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 | Gate | input | Gate terminal; gate-source voltage rated ±30 V continuous, with threshold voltage 2.0 V min to 4.0 V max at VDS=VGS, ID=250µA. |
| 2 | Drain | passive | Drain terminal; drain-source voltage rated 900 V, continuous drain current 3 A and pulsed drain current 12 A. |
| 3 | Source | passive | Source terminal, connected to the body diode anode; continuous diode forward current is 3 A max. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | OSEN |
| 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 Breakdown Voltage | BVDSS | 900 |  |  | V | ID=250µA, VGS=0V, TJ=25°C | 2 |
| Gate Threshold Voltage | VGS(th) | 2 |  | 4 | V | VDS=VGS, ID=250μA | 2 |
| Gate-Body Leakage Current | IGSS | -100 |  | 100 | nA | VGS=±30V, VDS=0 | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 1 | μA | VDS=800V, VGS=0 | 2 |
| Diode Forward On-Voltage | VSD |  |  | 1 | V | IS=1A, VGS=0 | 3 |
| Drain-Source Voltage | VDSS |  |  | 900 | V |  | 2 |
| Gate-Source Voltage-Continuous | VGS | -30 |  | 30 | V |  | 2 |
| Drain Current-Continuous | ID |  |  | 3 | A |  | 2 |
| Drain Current-Single Pulsed | IDM |  |  | 12 | A |  | 2 |
| Power Dissipation | PD |  |  | 75 | W |  | 2 |
| Max. Operating Junction Temperature | Tj |  |  | 150 | ℃ |  | 2 |
| Thermal Resistance, Junction to Case | Rth(j-c) |  |  | 1.67 | ℃/W |  | 3 |

## CAD (KiCad official)

- Symbol: `OSD3N90`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `osd3n90-etched.step` / `osd3n90-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `osd3n90.step` / `osd3n90.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [OSEN datasheet](docs/osd3n90-datasheet.pdf) (3 pp, sha256 `45ef232fb74b158a`, 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/osd3n90-datasheet.pdf)