# KAO3400

**KUU** · MOSFETs · SOT-23-3L

KAO3400 from KUU, 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 | GATE | input | Gate terminal; gate-source voltage is rated at ±12 V maximum, with threshold Vth(GS) of 0.7 V min, 0.9 V typ and 1.4 V max at ID=250 uA. |
| 2 | SOURCE | passive | Source terminal of the N-channel MOSFET, returned to ground in the switching test circuit. |
| 3 | DRAIN | passive | Drain terminal; drain-source voltage is rated at 30 V and continuous drain current at 5.8 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KUU |
| 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 Breakdown Voltage | V(BR)DSS | 30 |  |  | V | VGS=0V,ID=250uA | 1 |
| Gate-Threshold Voltage | Vth(GS) | 0.7 | 0.9 | 1.4 | V | VDS= VGS, ID=250 uA | 1 |
| Gate-body Leakage | IGSS | -100 |  | 100 | nA | VDS=0V, VGS=±12V | 1 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 1 | uA | VDS=30V, VGS=0V | 1 |
| Drain-Source On-Resistance | RDS(ON) |  |  | 59 | mΩ | VGS=2.5V, ID=4A | 1 |
| Drain-Source On-Resistance | RDS(ON) |  |  | 45 | mΩ | VGS=4.5V, ID=2.9A | 1 |
| Drain-Source On-Resistance | RDS(ON) |  |  | 41 | mΩ | VGS=10V, ID=2.9A | 1 |
| Diode Forward Voltage | VSD |  | 0.75 | 1.2 | V | VGS=0V, ID=2.9A | 1 |
| Drain-Source Voltage | VDS |  |  | 30 | V |  | 1 |
| Gate-Source Voltage | VGS | -12 |  | 12 | V | printed as ±12 | 1 |
| Drain Current | ID |  |  | 5.8 | A | TA=25℃ (maximum ratings table) | 1 |
| Power Dissipation | PD |  |  | 1.4 | W | TA=25℃ (maximum ratings table) | 1 |
| Junction Temperature | Tj | -55 |  | 150 | ℃ | printed as -55-150 | 1 |
| Storage Temperature | Tstg | -55 |  | 150 | ℃ | printed as -55-150 | 1 |

## CAD (KiCad official)

- Symbol: `KAO3400`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files: `kao3400-etched.step` / `kao3400-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `kao3400.step` / `kao3400.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KUU datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588944740624162817) (2 pp, sha256 `5c2de1c038915c01`, retrieved 2026-10-09, 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/kao3400-datasheet.pdf)