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MC7912CTG

Public Made by Adom

by adom

onsemi Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-220. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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MC7912CTG

onsemi · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-220

MC7912CTG from onsemi, 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 GND power_in Common ground reference shared between input and output supplies. Also serves as the return for the internal reference and error amplifier.
2 VI power_in Unregulated negative input voltage (typ. -14.5 V to -30 V for the -12 V part; absolute maximum -35 V, -40 V for the 24 V option). Heatsink tab (Case 221AB) is electrically connected to this pin. A 0.33 uF bypass capacitor is recommended if the regulator sits an appreciable distance from the power-supply filter.
3 VO power_out Regulated -12 V negative output, capable of >1.0 A with adequate heatsinking. A 1.0 uF output capacitor improves stability and transient response.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • MC7912CTG
  • MC7912CTGBTG
  • MC7912CTGBT
  • MC7912CTGD2TG
  • MC7912CTGD2T

CAD (KiCad official)

  • Symbol: MC7912CTG
  • Footprint: Package_TO_SOT_THT:TO-220-3_Vertical
  • 3D model: TO-220 (KiCad packages3D, STEP)
  • 3D model files: mc7912ctg-etched.step / mc7912ctg-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mc7912ctg.step / mc7912ctg.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
mc7912ctg.step 83 KB You want the bare part, or you mark your own boards.
mc7912ctg-etched.step 790 KB You want the part with MC7912CTG already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 209 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: onsemi datasheet (16 pp, sha256 01e22db47f1a6088, 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