# KSI2302W

**KUU** · MOSFETs · SOT-323

KSI2302W from KUU, in a SOT-323. 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, labelled "Base" on the datasheet package drawing; gate-source voltage limit is ±8 V and threshold is 0.65 to 1.2 V (0.95 V typ) at ID=50µA. |
| 2 | S | passive | Source, labelled "Emitter" on the datasheet package drawing; continuous source-drain diode current is 0.6 A max. |
| 3 | D | passive | Drain, labelled "Collector" on the datasheet package drawing; drain-source voltage is 20 V max and continuous drain current is 2.1 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KUU |
| Package | SOT-323 |
| 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 |
|---|---|---|---|---|---|---|---|
| Gate-threshold voltage | VGS(th) | 0.65 | 0.95 | 1.2 | V | VDS =VGS, ID =50µA | 2 |
| Drain-source on-resistance | rDS(on) |  | 0.045 | 0.06 | Ω | VGS =4.5V, ID =3.6A | 2 |
| Drain-source on-resistance | rDS(on) |  | 0.07 | 0.115 | Ω | VGS =2.5V, ID =3.1A | 2 |
| Diode forward voltage | VSD |  | 0.76 | 1.2 | V | IS=0.94A,VGS=0V | 2 |
| Total gate charge | Qg |  | 4 | 10 | nC | VDS =10V,VGS =4.5V,ID =3.6A | 2 |
| Turn-on delay time | td(on) |  | 7 | 15 | ns | VDD=10V, RL=5.5Ω, ID ≈3.6A, VGEN=4.5V, Rg=6Ω | 2 |
| Rise time | tr |  | 55 | 80 | ns | VDD=10V, RL=5.5Ω, ID ≈3.6A, VGEN=4.5V, Rg=6Ω | 2 |
| Turn-off delay time | td(off) |  | 16 | 60 | ns | VDD=10V, RL=5.5Ω, ID ≈3.6A, VGEN=4.5V, Rg=6Ω | 2 |
| Fall time | tf |  | 10 | 25 | ns | VDD=10V, RL=5.5Ω, ID ≈3.6A, VGEN=4.5V, Rg=6Ω | 2 |
| Drain-source breakdown voltage | V(BR)DSS | 20 |  |  | V | VGS = 0V, ID =10µA | 2 |
| Gate-body leakage | IGSS | -100 |  | 100 | nA | VDS =0V, VGS =±8V | 2 |
| Zero gate voltage drain current | IDSS |  |  | 1 | µA | VDS =20V, VGS =0V | 2 |
| Forward transconductance | gfs | 8 |  |  | S | VDS =5V, ID =3.6A | 2 |
| Drain-Source Voltage | VDS |  |  | 20 | V |  | 1 |
| Gate-Source Voltage | VGS | -8 |  | 8 | V |  | 1 |
| Continuous Drain Current | ID |  |  | 2.1 | A |  | 1 |
| Continuous Source-Drain Current (Diode Conduction) | IS |  |  | 0.6 | A |  | 1 |
| Power Dissipation | PD |  |  | 0.35 | W |  | 1 |
| Thermal Resistance from Junction to Ambient | RθJA |  |  | 357 | ℃/W | t≤5s | 1 |
| Operating Junction Temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Storage Temperature | TSTG | -55 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `KSI2302W`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `ksi2302w-etched.step` / `ksi2302w-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ksi2302w.step` / `ksi2302w.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KUU datasheet](docs/ksi2302w-datasheet.pdf) (4 pp, sha256 `2871af78d5bbc9df`, retrieved 2026-11-05, 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/ksi2302w-datasheet.pdf)