ZR431F01TA 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	VREF	input	Reference / feedback input. Internally compared to the 2.5 V bandgap reference; tie to the divider tap between the output and GND to program VZ = (1 + R1/R2) x VREF. Input current ~0.12 uA typ, 1.0 uA max.
2	VZ	power_in	Cathode / regulated output terminal. Sinks 0.05 mA to 100 mA in operation (150 mA absolute max) and clamps to the programmed VZ set by the VREF divider. Max cathode voltage 20 V.
3	GND	power_in	Anode / device ground return. All voltages in the datasheet are referenced to this pin.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

ZR431F01TAF005-7
ZR431F01TAF005TA
ZR431F01TAF01-7
ZR431F01TA
ZR431F01TAFTA
ZR431F01TAGTA

CAD (KiCad official)

Symbol: ZR431F01TA
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
`zr431f01ta.step`	59 KB	You want the bare part, or you mark your own boards.
`zr431f01ta-etched.step`	1.5 MB	You want the part with `ZR431F01TA` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 398 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 (11 pp, sha256 93e5c58d4c91bc6c, 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