MT9103ET 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, 3.0V to 5.5V operating range (absolute max 30V). Typical supply current 6.7 mA @ Vcc=5V. Bypass with 100 nF to GND close to the pin.
2	Out	output	Ratiometric rail-to-rail analog output proportional to the perpendicular magnetic flux density. Quiescent voltage Vcc/2 (2.500V @ Vcc=5V, 1.650V @ Vcc=3.3V). Source/sink capability ±1.5 mA; output resistance ~2 Ω. Recommended output loading: RL ≥ 4.7 kΩ to GND or Vcc, and CL ≤ 10 nF (typ 4.7 nF).
3	GND	power_in	Ground / reference return for supply and output.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

MT9103ET
MT9103ETA

CAD (KiCad official)

Symbol: MT9103ET
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
`mt9103et.step`	59 KB	You want the bare part, or you mark your own boards.
`mt9103et-etched.step`	1.4 MB	You want the part with `MT9103ET` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 345 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 (12 pp, sha256 a002ba99c385ccb1, 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