MC7812BDTRKG from onsemi, in a TO-252-2(DPAK). 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	Input	power_in	Unregulated positive input supply. Must remain approximately 2.0 V above the +12 V output (dropout ~2.0 V typ.) and not exceed 35 Vdc absolute max. A 0.33 uF ceramic input capacitor is required if the device is located an appreciable distance from the supply filter.
2	Ground	power_in	Device common / ground reference. A common ground is required between the input and output sides of the regulator. On the DPAK-3 (DT SUFFIX, CASE 369C) package the heatsink tab (drawn as terminal 4) is internally connected to pin 2 (Ground).
3	Output	power_out	Regulated +12 V positive output, capable of delivering >1.0 A with internal short-circuit and thermal protection. An output capacitor (Co) is not strictly required for stability but improves transient response; values <0.1 uF may cause instability.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	TO-252-2(DPAK)
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

MC7812BDTRKG
MC7812BDTRKGD2TG
MC7812BDTRKGD2TR4G
MC7812BDTRKGTG
MC7812BDTRKGBTG

CAD (KiCad official)

Symbol: MC7812BDTRKG
Footprint: Package_TO_SOT_SMD:TO-252-2
3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`mc7812bdtrkg.step`	119 KB	You want the bare part, or you mark your own boards.
`mc7812bdtrkg-etched.step`	2.0 MB	You want the part with `MC7812BDTRKG` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 514 faces against 83 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: onsemi datasheet (28 pp, sha256 a0831a3a6a3010ac, retrieved 2026-08-17, tier: manufacturer)
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