78D05 from Foshan Blue Rocket Elec, in a TO-252. 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	IN	power_in	Unregulated input voltage. Operating input range approximately 7 V to 25 V; absolute maximum 35 V. A 0.33 uF input bypass capacitor is recommended close to the pin.
2	GND	power_in	Ground / common return for the regulator. Pin 2 is electrically tied to pin 4 (tab) as the device's GND connection.
3	OUT	power_out	Regulated +5.0 V output (4.75 V to 5.25 V over line/load). Sources up to 1.5 A with internal thermal and short-circuit protection. A 0.1 uF output capacitor is recommended for stability.
4	GND	power_in	TO-252 heat-sink tab, internally connected to GND (common with pin 2). Provides the primary thermal path to the PCB copper pour.

Key specifications

Parameter	Value
Manufacturer	Foshan Blue Rocket Elec
Package	TO-252
Category	PMIC
Pins	4

CAD (KiCad official)

Symbol: 78D05
Footprint: Package_TO_SOT_SMD:TO-252-2
3D model: TO-252 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`78d05.step`	119 KB	You want the bare part, or you mark your own boards.
`78d05-etched.step`	1.2 MB	You want the part with `78D05` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 318 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: Foshan Blue Rocket Elec datasheet (6 pp, sha256 a436c55167a422a9, 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