# CJW1012

**Changjiang Electronics Tech (CJ)** · MOSFETs · SOT-323

CJW1012 from Changjiang Electronics Tech (CJ), 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; the datasheet rates the gate-source voltage VGS at ±12 V. |
| 2 | SOURCE | passive | Source terminal of the MOSFET, the reference for VGS; the body diode forward voltage VSD is 1.2 V max at IS = 0.15 A, VGS = 0 V. |
| 3 | DRAIN | passive | Drain terminal of the MOSFET; the datasheet rates drain-source voltage VDSS at 20 V and continuous drain current ID at 500 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjiang Electronics Tech (CJ) |
| Package | SOT-323 |
| Category | Transistors |
| 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 | VDSS |  |  | 20 | V | Maximum ratings, Ta=25℃ | 1 |
| Gate-Source Voltage | VGS | -12 |  | 12 | V | Maximum ratings, printed as ±12 | 1 |
| Drain Current-Continuous | ID(DC) |  |  | 500 | mA | Maximum ratings | 1 |
| Drain Current-Pulsed | IDM(pulse) |  |  | 1000 | mA | Pulsed, note 1: pulse width limited by maximum junction temperature | 1 |
| Power Dissipation |  |  |  | 150 | mW | Ta=25℃, note 2 (no heat sink) | 1 |
| Maximum Power Dissipation | PD |  |  | 275 | mW | Tc=25℃, note 3 (infinite heat sink) | 1 |
| Storage Temperature (row as printed) | Tj |  |  | 150 | ℃ |  | 1 |
| Junction Temperature (row as printed) | Tstg | -55 |  | 150 | ℃ | Printed as -55 ~+150 | 1 |
| Thermal Resistance from Junction to Ambient | RθJA |  |  | 833 | ℃/W | Maximum ratings table | 1 |
| Thermal Resistance from Junction to Case | RθJC |  |  | 455 | ℃/W | Maximum ratings table | 1 |
| Drain-Source Breakdown Voltage | V(BR)DSS | 20 |  |  | V | VGS = 0V, ID =250µA | 2 |
| Gate-Threshold Voltage | VGS(th) | 0.45 |  | 1.2 | V | VDS =VGS, ID =250µA | 2 |
| Gate-Body Leakage Current | IGSS | -1 |  | 1 | µA | VDS =0V, VGS =±4.5V | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 100 | nA | VDS =16V, VGS =0V | 2 |
| Drain-Source On-State Resistance | RDS(on) |  |  | 700 | mΩ | VGS =4.5V, ID =600mA | 2 |
| Drain-Source On-State Resistance | RDS(on) |  |  | 850 | mΩ | VGS =2.5V, ID =500mA | 2 |
| Drain-Source Diode Forward Voltage | VSD |  |  | 1.2 | V | IS=0.15A, VGS = 0V, note 5 pulse test | 2 |

## CAD (KiCad official)

- Symbol: `CJW1012`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `cjw1012-etched.step` / `cjw1012-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cjw1012.step` / `cjw1012.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjiang Electronics Tech (CJ) datasheet](docs/cjw1012-datasheet.pdf) (5 pp, sha256 `e0cff21a68aa202d`, retrieved 2026-11-04, 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/cjw1012-datasheet.pdf)