CJ432 from Changjing, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	REF	input	Reference input pin. Voltage on this pin (1.2214-1.2586V, typ 1.24V) is compared internally against the bandgap reference; regulates the shunt when Vref threshold is exceeded. Reference input current is on the order of hundreds of nA (max 6μA over range).
2	CATHODE	passive	Cathode (K) of the shunt regulator. Sinks current from the load when Vref exceeds the internal bandgap. Max continuous cathode current 100mA, max cathode voltage 18V, dynamic impedance 0.5Ω typ.
3	ANODE	passive	Anode (A) of the shunt regulator. Normally tied to circuit ground / low-side return; forms the current return path for the shunt element.

Key specifications

Parameter	Value
Manufacturer	Changjing
Package	SOT-23
Category	PMIC
Pins	3

CAD (KiCad official)

Symbol: CJ432
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cj432.step`	59 KB	You want the bare part, or you mark your own boards.
`cj432-etched.step`	1.1 MB	You want the part with `CJ432` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 268 faces against 69 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: Changjing datasheet (7 pp, sha256 6ff031d80f2f1bfd, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF