MT1401AT-EN 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	Positive supply voltage input, 2.8 V to 24 V operating (27 V absolute max). Recommended 100 nF bypass capacitor to GND. Reverse-supply protected to -27 V.
2	OUT	output	Open-drain digital output. Pulls low (VDSon <= 0.4 V @ 20 mA) when magnetic flux exceeds Bop; releases high (leakage <= 10 uA @ 24 V) when flux drops below Brp. Requires external pull-up (recommended RL 1 k-10 kOhm); internally current-limited to ~50 mA (IOCP).
3	GND	power_in	Device ground return.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

MT1401AT-EN
MT1401ET-EN
MT1401A-EN
MT1401A-T-EN
MT1401BT-EN

CAD (KiCad official)

Symbol: MT1401AT-EN
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
`mt1401at-en.step`	59 KB	You want the bare part, or you mark your own boards.
`mt1401at-en-etched.step`	1.2 MB	You want the part with `MT1401AT-EN` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 343 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 (13 pp, sha256 36688178bd82cf02, 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