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LM78M12CDT

Public Unreviewed

by Ray

HGSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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LM78M12CDT

HGSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2

LM78M12CDT from HGSEMI, in a TO-252-2. 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 DC input voltage. For the 12V variant, VI up to 35V absolute max; recommended operating range ~14.5V to 30V. Bypass to GND with 0.33µF ceramic close to the pin.
2 GND power_in Common ground reference. Electrically connected to the exposed TAB of the TO-252-2 package; solder the TAB to a copper pour for both grounding and heatsinking.
3 VOUT power_out Regulated +12V output (11.75V-12.25V typical at TJ=25°C), up to 0.5A with adequate heatsinking. Bypass to GND with a 0.1µF ceramic close to the pin for stability.
TAB GND power_in Exposed thermal/electrical tab, internally tied to GND (pin 2). Solder to a ground copper pour to conduct heat away from the die.

Key specifications

Parameter Value
Manufacturer HGSEMI
Package TO-252-2
Category PMIC
Pins 4

Ordering variants

Same part, different packaging or reel option.

  • LM78M12CDT
  • LM78M12CDT/TR
  • LM78M12CDTMP
  • LM78M12CDTMP/TR

CAD (KiCad official)

  • Symbol: LM78M12CDT
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252-2 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
lm78m12cdt.step 119 KB You want the bare part, or you mark your own boards.
lm78m12cdt-etched.step 1.5 MB You want the part with LM78M12CDT already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 395 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: HGSEMI datasheet (13 pp, sha256 8144e826c281aa11, 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