OH44E-S from Nanjing Ouzhuo 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	VCC	power_in	Supply voltage input. Absolute max 3.5-30 V; recommended operating 4-24 V. Internal reverse-voltage protection and on-chip regulator. Typical supply current ICC ~6 mA (OC output open).
2	GND	power_in	Ground / 0 V reference return for the supply and open-collector output stage.
3	VOUT	output	Open-collector Schmitt-trigger digital output; requires an external pull-up resistor (RL, e.g. 1 kΩ) to VCC or another logic rail. Pulls low (VOL ~200 mV @ 5 V/1 kΩ) when magnetic flux density B ≥ BOP (max 160 GS, south/N pole facing the marked side); releases high (leakage IOH ~0.1 µA, 10 µA max) when B ≤ BRP (min 20 GS). Hysteresis BH ~50 GS. Sink current up to 25 mA; tr/tf ~0.1 µs (RL=1 kΩ, CL=20 pF).

Key specifications

Parameter	Value
Manufacturer	Nanjing Ouzhuo Tech
Package	SOT-23
Category	Sensor
Pins	3

Ordering variants

Same part, different packaging or reel option.

OH44E-SS

CAD (KiCad official)

Symbol: OH44E-S
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Nanjing Ouzhuo Tech datasheet (3 pp, sha256 17106bff6e296994, 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