MT8311ET from Magn Tek, 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	VCC	power_in	Supply voltage input. Operating range 3.8 V to 60 V; absolute maximum 65 V; reverse-supply protection to -20 V. Typical supply current 4 mA. Bypass with 100 nF ceramic to GND close to the pin.
2	OUT	output	Open-drain switch output. Pulled Low (VDSON <= 0.4 V @ IOUT = 15 mA) when magnetic flux density B > BOP and released High (leakage <= 10 uA at 24 V) when B < BRP. Requires external pull-up RL (recommended 1 kOhm to 10 kOhm). Continuous IOUT rated 40 mA max; short-circuit current limited to ~50 mA.
3	GND	power_in	Ground reference for supply and output driver.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

MT8311ET
MT8311ETAT
MT8311ETA
MT8311ETA-T
MT8311ETBT

CAD (KiCad official)

Symbol: MT8311ET
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
`mt8311et.step`	59 KB	You want the bare part, or you mark your own boards.
`mt8311et-etched.step`	1.3 MB	You want the part with `MT8311ET` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 330 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 (14 pp, sha256 f578939fc3c7edf7, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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