# SI2302 2.9A

**KUU** · MOSFETs · SOT-23

SI2302 2.9A from KUU, in a SOT-23. 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 is rated ±10 V max, with threshold 0.5 V min, 0.75 V typ, 1.2 V max at ID=250 uA. |
| 2 | SOURCE | passive | Source terminal; continuous drain current is rated 2.9 A and body-diode forward current is 2.9 A. |
| 3 | DRAIN | passive | Drain terminal; drain-source voltage is rated 20 V max, with RDS(on) of 30 mΩ typ and 45 mΩ max at VGS=4.5 V, ID=2.9 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KUU |
| Package | SOT-23 |
| Category | Triode/MOS Tube/Transistor |
| 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 |  |  | 20 | V | TA=25℃ | 1 |
| Gate-Source voltage | VGS | -10 |  | 10 | V | TA=25℃ | 1 |
| Drain current | ID |  |  | 2.9 | A | TA=25℃ | 1 |
| Power Dissipation | PD |  |  | 1 | W | TA=25℃ | 1 |
| Junction Temperature | Tj |  |  | 150 | ℃ | TA=25℃ | 1 |
| Storage Temperature | Tstg | -55 |  | 150 | ℃ | TA=25℃ | 1 |
| Drain-Source Breakdown Voltage | V(BR)DSS | 20 |  |  | V | VGS=0V,ID=250uA | 1 |
| Gate-Threshold Voltage | Vth(GS) | 0.5 | 0.75 | 1.2 | V | VDS= VGS, ID=250 uA | 1 |
| Gate-body Leakage | IGSS | -100 |  | 100 | nA | VDS=0V, VGS=±10V | 1 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 1 | uA | VDS=20V, VGS=0V | 1 |
| Drain-Source On-Resistance | rDS(ON) |  | 37 | 59 | mΩ | VGS=2.5V, ID=2.5A | 1 |
| Drain-Source On-Resistance | rDS(ON) |  | 30 | 45 | mΩ | VGS=4.5V, ID=2.9A | 1 |
| Turn-on Delay Time | td(on) |  | 10 | 15 | nS | VDD=10V, ID=2.9A, VGS=4.5V, RGEN=6Ω | 1 |
| Turn-on Rise Time | tr |  | 50 | 85 | nS | VDD=10V, ID=2.9A, VGS=4.5V, RGEN=6Ω | 1 |
| Turn-off Delay Time | td(off) |  | 17 | 45 | nS | VDD=10V, ID=2.9A, VGS=4.5V, RGEN=6Ω | 1 |
| Turn-off Fall Time | tf |  | 10 | 20 | nS | VDD=10V, ID=2.9A, VGS=4.5V, RGEN=6Ω | 1 |
| Total Gate Charge | Qg |  | 4 | 10 | nC | VDS=10V, ID=2.9A, VGS=4.5V | 1 |
| Diode Forward Voltage | VSD |  | 0.75 | 1.2 | V | VGS=0V, IS=2.9A | 1 |
| Forward Trans conductance | gfs |  | 9.5 |  | s | VDS=5V, ID=2.9A | 1 |
| Input Capacitance | Ciss |  | 300 |  | pF | VDS=10V, VGS=0V, f=1MHz | 1 |
| Output Capacitance | Coss |  | 120 |  | pF | VDS=10V, VGS=0V, f=1MHz | 1 |
| Reverse Transfer Capacitance | Crss |  | 80 |  | pF | VDS=10V, VGS=0V, f=1MHz | 1 |
| Gate-Source Charge | Qgs |  | 0.65 |  | nC | VDS=10V, ID=2.9A, VGS=4.5V | 1 |
| Gate-Drain Charge | Qgd |  | 1.2 |  | nC | VDS=10V, ID=2.9A, VGS=4.5V | 1 |
| Diode Forward Current | Is |  | 2.9 |  | A |  | 1 |

## CAD (KiCad official)

- Symbol: `SI2302 2.9A`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `si2302-2-9a-etched.step` / `si2302-2-9a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `si2302-2-9a.step` / `si2302-2-9a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KUU datasheet](docs/si2302-2-9a-datasheet.pdf) (2 pp, sha256 `960f6283e7412d32`, retrieved 2026-10-22, 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/si2302-2-9a-datasheet.pdf)