# FSS2302

**FOSAN** · MOSFETs · SOT-23-3L

FSS2302 from FOSAN, in a SOT-23-3L. 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 is limited to ±10 V absolute maximum, with a gate threshold of 0.55 V min, 0.78 V typ and 1.1 V max at ID=250 µA. |
| 2 | S | passive | Source; continuous drain current is 3.5 A at TA=25 °C and the body diode forward drop is 1.2 V max at ISD=3 A. |
| 3 | D | passive | Drain; drain-source voltage is rated 20 V, with 3.5 A continuous and 12 A pulsed drain current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | FOSAN |
| Package | SOT-23-3L |
| 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 | BVDSS |  |  | 20 | V |  | 1 |
| Gate-Source Voltage | VGS |  |  | 10 | V |  | 1 |
| Drain Current (continuous) | ID |  |  | 3.5 | A | TA = 25°C | 1 |
| Drain Current (pulsed) | IDM |  |  | 12 | A |  | 1 |
| Total Device Dissipation | PD |  |  | 900 | mW | TA = 25°C | 1 |
| Thermal Resistance Junction-Ambient | RΘJA |  |  | 139 | ℃/W |  | 1 |
| Junction/Storage Temperature | TJ,Tstg | -55 |  | 150 | ℃ |  | 1 |
| Drain-Source Breakdown Voltage | BVDSS | 20 |  |  | V | ID = 250uA, VGS = 0V | 2 |
| Gate Threshold Voltage | VGS(th) | 0.55 | 0.78 | 1.1 | V | ID = 250uA, VGS = VDS | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 1 | uA | VGS = 0V, VDS = 20V | 2 |
| Gate Body Leakage | IGSS |  |  | 100 | nA | VGS = +10V, VDS = 0V | 2 |
| Static Drain-Source On-State Resistance | RDS(ON) |  | 40 | 55 | mΩ | ID = 3.5A, VGS = 4.5V | 2 |
| Static Drain-Source On-State Resistance | RDS(ON) |  | 52 | 80 | mΩ | ID = 2A, VGS = 2.5V | 2 |
| Diode Forward Voltage Drop | VSD |  |  | 1.2 | V | ISD = 3A, VGS = 0V | 2 |

## CAD (KiCad official)

- Symbol: `FSS2302`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files: `fss2302-etched.step` / `fss2302-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fss2302.step` / `fss2302.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [FOSAN datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757174932223090688) (4 pp, sha256 `aaf1513dc4d45df2`, retrieved 2026-10-09, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/fss2302-datasheet.pdf)