# CJ431-HAF

**Changjing** · Voltage References · SOT-23

CJ431-HAF from Changjing, 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 | REFERENCE | input | Reference input of the adjustable shunt regulator, with a reference input current range of 0.05 to +10 mA and a reference voltage of 2.475 to 2.525 V at VKA=VREF, IKA=10 mA. |
| 2 | CATHODE | passive | Cathode of the shunt regulator, rated for a cathode voltage up to 36 V and a continuous cathode current of -100 to +150 mA. |
| 3 | ANODE | passive | Anode of the shunt regulator, the return path for the cathode current of -100 to +150 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-23 |
| Category | Power Supply Chip |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `CJ431-HAF`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `cj431-haf-etched.step` / `cj431-haf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cj431-haf.step` / `cj431-haf.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Changjing datasheet](docs/cj431-haf-datasheet.pdf) (11 pp, sha256 `362090c089861970`, retrieved 2026-10-28, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/cj431-haf-datasheet.pdf)