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MC7812BD2TR4G

Public Unreviewed

by Ray

onsemi Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-263-2. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

Schematic Symbol

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PCB Footprint

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Datasheet

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Contents

README

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MC7812BD2TR4G

onsemi · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-263-2

MC7812BD2TR4G from onsemi, in a TO-263-2. 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 MC7812 the input must be at least ~2.0 V above VOUT (i.e. ≥14 V) and no greater than the 35 Vdc absolute maximum. A 0.33 µF input bypass capacitor (Cin) is required if the regulator is located an appreciable distance from the power-supply filter.
2 GND power_in Common ground reference for both input and output. Also internally connected to the exposed heatsink tab (terminal 4 in the case outline drawing) for thermal dissipation to the PCB copper pour.
3 Vout power_out Regulated +12 V output, 1.0 A continuous (2.2 A peak). Output capacitor CO is not required for stability but improves transient response; values below 0.1 µF can cause instability. Typical output noise 10 µV/V0 (10 Hz-100 kHz).

Key specifications

Parameter Value
Manufacturer onsemi
Package TO-263-2
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • MC7812BD2TR4G
  • MC7812BD2TR4GD2TG
  • MC7812BD2TR4GT
  • MC7812BD2TR4GTG
  • MC7812BD2TR4GDT
  • MC7812BD2TR4GDTG
  • MC7812BD2TR4GDTRK
  • MC7812BD2TR4GDTRKG

CAD (KiCad official)

  • Symbol: MC7812BD2TR4G
  • Footprint: Package_TO_SOT_SMD:TO-263-2
  • 3D model: TO-263-2 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
mc7812bd2tr4g.step 108 KB You want the bare part, or you mark your own boards.
mc7812bd2tr4g-etched.step 2.1 MB You want the part with MC7812BD2TR4G already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 550 faces against 79 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