MT8631AT from Magn Tek, in a SOT-23-3L. 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	Vcc	power_in	Positive supply voltage input. Operating range 2.0V to 5.5V (absolute max 7V). Typical supply current ~1.2uA at Vcc=3.6V, ~600nA at Vcc=2.0V.
2	Out	output	Push-pull digital output. Drives LOW (VOL <= 0.4V at Iout=5mA) when
3	GND	power_in	Ground reference for the device.

Key specifications

Parameter	Value
Manufacturer	Magn Tek
Package	SOT-23-3L
Category	Sensor
Pins	3

Ordering variants

Same part, different packaging or reel option.

MT8631AT
MT8631ATA
MT8631ATDT-1616

CAD (KiCad official)

Symbol: MT8631AT
Footprint: Package_TO_SOT_SMD:SOT-23-3
3D model: SOT-23-3L (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`mt8631at.step`	59 KB	You want the bare part, or you mark your own boards.
`mt8631at-etched.step`	1.4 MB	You want the part with `MT8631AT` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 358 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: Magn Tek datasheet (11 pp, sha256 0d745458b0d3ea52, 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