APX803S-31SA-7 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	GND	power_in	Ground reference for the supervisor. Connect to system ground.
2	RESET	output	Active-low, open-drain reset output. Asserts low when VCC falls below the 3.08V (typ.) threshold and remains low for the reset timeout period (140ms min, 240ms typ.) after VCC recovers. Requires an external pull-up resistor. Guaranteed logic-low output for VCC > 1V; becomes high-impedance when VCC < 1V. VOL = 0.3V max at ISINK = 1.2mA; max sink 20mA absolute.
3	VCC	power_in	Operating voltage input and monitored supply. Recommended 1.0V to 5.5V; absolute max 6.0V. Bypass with 100nF to GND close to the pin.

Key specifications

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

Ordering variants

APX803S-31SA-7
APX803S-31SA-7SR-7

CAD (KiCad official)

Symbol: APX803S-31SA-7
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
`apx803s-31sa-7.step`	59 KB	You want the bare part, or you mark your own boards.
`apx803s-31sa-7-etched.step`	2.5 MB	You want the part with `APX803S-31SA-7` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 593 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 (9 pp, sha256 58d0867f60d9b289, 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