LR8321A-M50 from LR, 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	Device ground reference. All voltage measurements in the datasheet are referenced to this pin.
2	VIN	power_in	Input supply pin. Operating input range up to 24V (32V absolute max). Bypass to GND with a 1uF ceramic capacitor placed close to the pin.
3	VOUT	power_out	Regulated output voltage pin. Fixed 5.0V nominal (±2% accuracy) for the -M50 suffix, delivering up to 100mA. Bypass to GND with a 1uF ceramic capacitor.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

LR8321A-M50
LR8321A-M50T50

CAD (KiCad official)

Symbol: LR8321A-M50
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
`lr8321a-m50.step`	57 KB	You want the bare part, or you mark your own boards.
`lr8321a-m50-etched.step`	1.7 MB	You want the part with `LR8321A-M50` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 443 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: LR datasheet (12 pp, sha256 75e1ff006d959d36, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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