SCJA1117B-3.3-A from Changjing, in a SOT-89-3L. 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	GND	power_in	Ground reference for the fixed-output regulator. On the ADJ variant this pin becomes the ADJ feedback input; on the SCJA1117B-3.3-A fixed version it is tied to system ground.
2	OUTPUT	power_out	Regulated 3.3V output. Delivers up to 1A with typical dropout of 1.3V. Requires a 10uF tantalum output capacitor (C2) to ground for stability.
3	IN	power_in	Unregulated input supply. Operating range 4.8V to 12V for the -3.3-A variant (Vin absolute max 20V). Requires a 10uF tantalum bypass capacitor (C1) to ground.

Key specifications

Parameter	Value
Manufacturer	Changjing
Package	SOT-89-3L
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

SCJA1117B-3.3-A

CAD (KiCad official)

Symbol: SCJA1117B-3.3-A
Footprint: Package_TO_SOT_SMD:SOT-89-3
3D model: SOT-89-3L (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`scja1117b-3-3-a.step`	57 KB	You want the bare part, or you mark your own boards.
`scja1117b-3-3-a-etched.step`	1.7 MB	You want the part with `SCJA1117B-3.3-A` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 463 faces against 42 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 914cf4603359796e, 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