# CJU40P03

**Changjing** · MOSFETs · TO-252-2L

CJU40P03 from Changjing, in a TO-252-2L. 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; gate-source voltage limited to ±20V (VGS rating, IGSS tested at VGS=±20V), threshold VGS(th) -1V to -2.5V at ID=-250µA. |
| 2 | D | passive | Drain (center position and mounting tab); drain-source voltage -30V minimum breakdown at ID=-250µA, continuous drain current -40A. |
| 3 | S | passive | Source; drain-source diode continuous forward current IS of -40A and pulsed ISM of -160A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | TO-252-2L |
| 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 = -250µA | 2 |
| Gate-threshold voltage | VGS(th) | -1 | -1.53 | -2.5 | V | VDS = VGS, ID = -250µA | 2 |
| Gate-body leakage current | IGSS | -100 |  | 100 | nA | VDS = 0V, VGS = ±20V | 2 |
| Zero gate voltage drain current (TJ = 25℃) | IDSS |  |  | 1 | µA | VDS = -24V, VGS = 0V, TJ = 25℃ | 2 |
| Zero gate voltage drain current (TJ = 125℃) | IDSS |  |  | 100 | µA | VDS = -24V, VGS = 0V, TJ = 125℃ | 2 |
| Static drain-source on-state resistance | RDS(on) |  | 10 | 15 | mΩ | VGS = -10V, ID = -20A | 2 |
| Static drain-source on-state resistance | RDS(on) |  | 14 | 25 | mΩ | VGS = -4.5V, ID = -15A | 2 |
| Drain-source diode forward voltage | VSD |  |  | -1.2 | V | VGS = 0V | 2 |
| Continuous drain-source diode forward current | IS |  |  | -40 | A |  | 2 |
| Pulsed drain-source diode forward current | ISM |  |  | -160 | A |  | 2 |
| Power dissipation | PD |  |  | 100 | W |  | 1 |
| Thermal resistance, junction to ambient | RθJ-A |  |  | 75 | ℃/W | Device mounted on 1 in² FR-4 board, 2oz Cu, still air, Ta = 25℃ | 2 |
| Thermal resistance, junction to case | RθJ-C |  |  | 1.67 | ℃/W |  | 1 |
| Operating junction and storage temperature range | TJ, Tstg | -55 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `CJU40P03`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252-2L (KiCad packages3D, STEP)
- 3D model files: `cju40p03-etched.step` / `cju40p03-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cju40p03.step` / `cju40p03.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/8590920203620327424) (5 pp, sha256 `bd1c8b0f7a4d4dc4`, retrieved 2026-10-18, 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/cju40p03-datasheet.pdf)