# 2SK1658

**Changjing** · MOSFETs · SOT-323

2SK1658 from Changjing, 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 | GATE | input | Gate terminal of the N-channel MOSFET, limited to a gate-source voltage VGS of ±7 V. |
| 2 | SOURCE | passive | Source terminal of the N-channel MOSFET, the reference for the 30 V drain-source and ±7 V gate-source ratings. |
| 3 | DRAIN | passive | Drain terminal of the N-channel MOSFET, rated for 30 V drain-source voltage and 0.1 A continuous drain current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| 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 Breakdown Voltage | V(BR)DSS | 30 |  |  | V | VGS = 0V, ID = 10µA | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 1 | µA | VDS = 30V, VGS = 0V | 2 |
| Gate-Source leakage current | IGSS | -1 |  | 1 | µA | VGS = ±3V, VDS = 0V | 2 |
| Gate Cut-off Voltage | VGS(off) | 0.9 |  | 1.5 | V | VDS = 3V, ID = 1µA | 2 |
| Drain-Source On-Resistance | RDS(on) |  |  | 10 | Ω | VGS = 4V, ID = 10mA | 2 |
| Drain-Source On-Resistance | RDS(on) |  |  | 15 | Ω | VGS = 2.5V, ID = 10mA | 2 |
| Drain-Source Voltage | VDS |  |  | 30 | V |  | 1 |
| Gate-Source Voltage | VGS | -7 |  | 7 | V |  | 1 |
| Continuous Drain Current | ID |  |  | 0.1 | A |  | 1 |
| Power Dissipation | PD |  |  | 0.2 | W |  | 1 |
| Junction Temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Storage Temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance from Junction to Ambient | RθJA |  |  | 625 | ℃/W |  | 1 |

## CAD (KiCad official)

- Symbol: `2SK1658`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `2sk1658-etched.step` / `2sk1658-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2sk1658.step` / `2sk1658.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588912427207024640) (5 pp, sha256 `8e74b0095343ee08`, retrieved 2026-10-18, 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/2sk1658-datasheet.pdf)