# KY2302S

**KY** · MOSFETs · SOT-23

KY2302S from KY, 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 | G | input | Gate of the N-channel MOSFET; gate-source voltage is rated at ±10 V (VGS). |
| 2 | S | passive | Source of the N-channel MOSFET; the source-drain diode forward voltage is 1.2 V max at VGS=0 V and IS=1 A. |
| 3 | D | passive | Drain of the N-channel MOSFET; rated at 20 V drain-source voltage (VDS) and 2 A continuous drain current (ID). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KY |
| Package | SOT-23 |
| 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 | VDS |  |  | 20 | V | Ta=25℃ | 1 |
| Gate-Source Voltage | VGS | -10 |  | 10 | V | Ta=25℃ | 1 |
| Continuous Drain Current | ID |  |  | 2 | A | Ta=25℃ | 1 |
| Pulsed Drain Current | IDM |  |  | 8 | A | Ta=25℃ | 1 |
| Maximum Power Dissipation | PD |  |  | 0.4 | W | Ta=25℃ | 1 |
| Junction Temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Storage Temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance from Junction to Ambient | RθJA |  |  | 312 | ℃/W | t ≤5s | 1 |
| Drain-source breakdown voltage | V(BR)DSS | 20 |  |  | V | VGS = 0V, ID =250µA | 2 |
| Zero gate voltage drain current | IDSS |  |  | 1 | µA | VDS =20V,VGS = 0V | 2 |
| Gate-body leakage current | IGSS | -100 |  | 100 | nA | VGS =±10V, VDS = 0V | 2 |
| Gate threshold voltage | VGS(th) | 0.5 | 0.7 | 1.2 | V | VDS = VGS, ID =250µA | 2 |
| Drain-source on-resistance | RDS(on) |  | 53 | 80 | mΩ | VGS =4.5V, ID =2A | 2 |
| Drain-source on-resistance | RDS(on) |  | 72 | 115 | mΩ | VGS =2.5V, ID =2A | 2 |
| Diode Forward voltage | VSD |  |  | 1.2 | V | VGS =0V, IS=1A | 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 |
| Total gate charge | Qg |  | 4 | 10 | nC | VDS =10V,VGS =4.5V,ID =3.6A | 2 |

## CAD (KiCad official)

- Symbol: `KY2302S`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `ky2302s-etched.step` / `ky2302s-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ky2302s.step` / `ky2302s.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KY datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590233123104993280) (5 pp, sha256 `a7453574e0f14ba3`, retrieved 2026-10-20, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/ky2302s-datasheet.pdf)