# 2SK3018W

**hongjiacheng** · MOSFETs · SOT-323

2SK3018W from hongjiacheng, 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 terminal of the N-channel MOSFET, with an integrated gate protection diode; VGS is rated ±20 V. |
| 2 | S | passive | Source terminal of the N-channel MOSFET, rated for a drain-source voltage VDS of 30 V. |
| 3 | D | passive | Drain terminal of the N-channel MOSFET, rated for 30 V VDS and 0.1 A continuous drain current (0.4 A pulsed). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | hongjiacheng |
| 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 |
|---|---|---|---|---|---|---|---|
| Drain-source Voltage | VDS |  |  | 30 | V |  | 1 |
| Gate-source Voltage | VGS | -20 |  | 20 | V |  | 1 |
| Drain Current | Id |  |  | 0.1 | A |  | 1 |
| Pulsed Drain Current | IDM |  |  | 0.4 | A |  | 1 |
| Total Power Dissipation | Pd |  |  | 200 | mW |  | 1 |
| Storage temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Junction temperature | Tj | -55 |  | 150 | ℃ |  | 1 |
| Typical Thermal Resistance | RθJ-A |  | 625 |  | ℃/W |  | 1 |
| Drain-Source Breakdown Voltage | BVDSS | 30 |  |  | V | VGS=0V, ID=250μA | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 1 | μA | VDS=30V, VGS=0V | 2 |
| Gate-Body Leakage Current | IGSS | -10 |  | 10 | μA | VGS=±20V, VDS=0V | 2 |
| Gate Threshold Voltage | VGS(th) | 0.8 |  | 1.5 | V | VDS=3.0V, ID=0.1mA | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  |  | 8 | Ω | VGS=4.0V, ID=10mA | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  |  | 13 | Ω | VGS=2.5V, ID=1.0mA | 2 |
| Forward Transconductance | gfs | 20 |  |  | mS | VDS=3.0V, ID=10mA | 2 |

## CAD (KiCad official)

- Symbol: `2SK3018W`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `2sk3018w-etched.step` / `2sk3018w-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sk3018w.step` / `2sk3018w.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [hongjiacheng datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8772513589904969728) (4 pp, sha256 `35056c72c14f565a`, retrieved 2026-10-09, 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/2sk3018w-datasheet.pdf)