component

CJ431 ±0.5%

Public Unreviewed

by Ray

Changjing Voltage Reference, TO-92-3. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpmiccj431 ±0.5%
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗

Symbol & Footprint

Schematic Symbol

Open full view ↗

PCB Footprint

Open full view ↗
Contents

README

markdown

CJ431 ±0.5%

Changjing · Voltage Reference · TO-92-3

CJ431 ±0.5% from Changjing, in a TO-92-3. 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. High-impedance input to the internal error amplifier; the device sinks cathode current to regulate this pin to Vref ≈ 2.5 V (2.487-2.513 V for the ±0.5% grade). Typical bias current 1.5 µA (max 4 µA).
2 A power_in Anode. Return path of the shunt regulator, normally tied to circuit ground/common. Cathode current flows from K to A when the device is in regulation.
3 K power_in Cathode. Regulated node; sinks 1 mA to 100 mA (absolute max 150 mA) up to VKA = 36 V. Connected to the supply through a series resistor in typical shunt-regulator use.

Key specifications

Parameter Value
Manufacturer Changjing
Package TO-92-3
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • CJ431 (marking '431')
  • CJ431 (marking 'CJ431')
  • CJ431 (bulk)
  • CJ431-TA (tape)
  • CJ431 ±0.5%CD431 (marking 'CD431')

CAD (KiCad official)

  • Symbol: CJ431 ±0.5%
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
cj431-0-5.step 27 KB You want the bare part, or you mark your own boards.
cj431-0-5-etched.step 1.7 MB You want the part with CJ431 0.5% already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 411 faces against 19 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 (9 pp, sha256 68a405075950c4b5, 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