SK1816G-AE3-R from UTC Unisonic Tech, 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	OUT	output	Open-collector Hall latch output. Sinks up to ~20 mA (VOL <= 0.7 V at 12 mA); latches LOW when magnetic flux exceeds BOP (~~5 mT) and latches HIGH when flux drops below BRP (~~-5 mT). Requires an external pull-up resistor (e.g. 10 kOhm) to VCC.
2	VCC	power_in	Supply voltage input, 2.5 V to 20 V. Typical supply current ~6 mA at 16 V, ~5.5 mA at 3.6 V; absolute max ICC 10 mA. Built-in protection diode is present on this pin.
3	GND	power_in	Ground reference for the device.

Key specifications

Parameter	Value
Manufacturer	UTC Unisonic Tech
Package	SOT-23
Category	Sensor
Pins	3

Ordering variants

Same part, different packaging or reel option.

SK1816G-AE3-R
SK1816G-AE3-RG03-B
SK1816G-AE3-RG03-K

CAD (KiCad official)

Symbol: SK1816G-AE3-R
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
`sk1816g-ae3-r.step`	59 KB	You want the bare part, or you mark your own boards.
`sk1816g-ae3-r-etched.step`	2.1 MB	You want the part with `SK1816G-AE3-R` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 521 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: UTC Unisonic Tech datasheet (8 pp, sha256 45430608d678b140, 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