MC78M08CDTRKG from onsemi, in a DPAK-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	VIN	power_in	Unregulated positive input voltage. For the 8 V (M08) variant, VI operates from 10.5 V to 25 V (absolute maximum 35 V). A ≥0.33 µF bypass capacitor to ground is recommended when the device is located far from the supply filter capacitor.
2	GND	power_in	Common ground return for input and output. In the DPAK (DT/Case 369C) package this pin is electrically connected to the exposed heatsink tab (terminal 4), so the tab is also at ground potential.
3	VOUT	power_out	Regulated +8.0 V output, up to 500 mA (700 mA peak) with adequate heatsinking. Output tolerance is ±4% (MC78M08C) / ±2% (MC78M08AC). A ≥0.1 µF output capacitor is recommended to improve transient response.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	DPAK-3
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

MC78M08CDTRKG
MC78M08CDTRKGTG

CAD (KiCad official)

Symbol: MC78M08CDTRKG
Footprint: Package_TO_SOT_SMD:TO-252-2
3D model: DPAK-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`mc78m08cdtrkg.step`	119 KB	You want the bare part, or you mark your own boards.
`mc78m08cdtrkg-etched.step`	2.2 MB	You want the part with `MC78M08CDTRKG` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 560 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 (15 pp, sha256 4ae6cd4978cb4cd9, 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