L7812CV from UMW, in a TO-220. 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	VI	power_in	Unregulated positive input voltage. Absolute max input 35 V (for VO=5-18V variants). A 0.33 µF input bypass capacitor is recommended near the pin to suppress oscillation when the regulator is located far from the raw supply filter.
2	GND	power_in	Common ground reference for both input and output. On the TO-220 package this pin is electrically connected to the metal tab, so the tab must be treated as GND when heatsinking.
3	VO	power_out	Regulated +12 V output (typ; 11.4-12.6 V over line/load). Delivers up to 1.2 A with adequate heatsinking. A 0.1 µF ceramic output capacitor is recommended for transient response; larger tantalum/electrolytic caps improve stability.

Key specifications

Parameter	Value
Manufacturer	UMW
Package	TO-220
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

L7812CV
L7812CVD2T
L7812CVDT

CAD (KiCad official)

Symbol: L7812CV
Footprint: Package_TO_SOT_THT:TO-220-3_Vertical
3D model: TO-220 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`l7812cv.step`	83 KB	You want the bare part, or you mark your own boards.
`l7812cv-etched.step`	611 KB	You want the part with `L7812CV` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 164 faces against 48 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: UMW datasheet (18 pp, sha256 187ff89cc4c93f6a, 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