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LM4040C30FTA

Public Unreviewed

by Ray

Diodes Incorporated Voltage Reference, SOT-23. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpmiclm4040c30fta
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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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LM4040C30FTA

Diodes Incorporated · Voltage Reference · SOT-23

LM4040C30FTA from Diodes Incorporated, in a SOT-23. 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 Cathode passive Cathode of the shunt voltage reference. Sinks reverse current (60µA to 15mA) from an external bias resistor; the reference regulates this pin to VREF = 3.0V above the Anode.
2 Anode passive Anode of the shunt voltage reference. Serves as the ground/return terminal; all voltages in the datasheet are referenced to this pin unless otherwise stated.
3 NC unconnected No internal connection. Per the datasheet, pin 3 must be left floating or tied to pin 2 (Anode).

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOT-23
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • LM4040C30FTA

CAD (KiCad official)

  • Symbol: LM4040C30FTA
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
lm4040c30fta.step 59 KB You want the bare part, or you mark your own boards.
lm4040c30fta-etched.step 2.0 MB You want the part with LM4040C30FTA already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 495 faces against 69 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: Diodes Incorporated datasheet (16 pp, sha256 273ea3e61e9ec2d9, 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