AP431SHANTR-G1 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	REF	input	Reference input to the internal error amplifier's non-inverting terminal. Regulates the cathode current so that this pin sits at VREF (2.495V typ) with respect to the anode. Typical reference input current 0.2µA, max 0.5µA.
2	CATHODE	passive	Cathode of the shunt regulator; sinks current from an external pull-up when VREF pin rises above the internal reference. Continuous cathode current range -100 to 150 mA; recommended operating cathode current 0.1 to 100 mA; absolute-max cathode voltage 40V (36V recommended).
3	ANODE	passive	Anode of the shunt regulator; the common return for cathode current and the reference-voltage return. Typically tied to circuit ground in shunt-regulator applications.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

AP431SHANTR-G1
AP431SANTR-G1
AP431SBNTR-G1
AP431SHBNTR-G1
AP431SAN1TR-G1
AP431SHAN1TR-G1
AP431SBN1TR-G1
AP431SHBN1TR-G1
AP431SARTR-G1
AP431SHARTR-G1
AP431SBRTR-G1
AP431SHBRTR-G1
AP431SAZTR-G1
AP431SHAZTR-G1
AP431SBZTR-G1
AP431SHBZTR-G1

CAD (KiCad official)

Symbol: AP431SHANTR-G1
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Diodes Incorporated datasheet (17 pp, sha256 770b9144c5e6fc10, 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