CH441PTB from COSEMITECH, in a TO-92S. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	VDD	power_in	Supply Voltage pin; the supply operates from 2.5 V to 22 V, with an absolute maximum supply voltage of 24 V.
2	GND	power_in	Ground pin; the device is protected if VDD and GND are reversed, up to -22 V.
3	OUT	output	Open-drain NMOS output with an internal 10 kΩ pull-up resistor; it can sink up to 25 mA, with output voltage limited to -0.3 V to 24 V and short-circuit current limited to 30 to 90 mA.

Key specifications

Parameter	Value
Manufacturer	COSEMITECH
Package	TO-92S
Category	Sensors
Pins	3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Supply voltage	VDD	2.5		22	V	-40 °C to 150 °C	7
Supply current	IDD		1.6	3	mA	VDD = 3.3V	7
Output saturation voltage	VDSon			0.4	V	at 20mA, Gauss >BOP	7
Output leakage current	IOFF			10	uA	VOUT = 24 V; Switch state = Off	7
Output current limit	IOUT(lim)	30		90	mA	Short-Circuit Protection	7
Output rise time	TR		0.2	2	uS	RLOAD = 820 Ω, CLOAD = 10 pF;	7
Output fall time	TF		0.1	2	uS	RLOAD = 820Ω, CLOAD = 10 pF	7
Power-on time	tPO			30	μs	TA = 25°C; CLOAD = 10 pF	7
Operating temperature	T	-40		150	°C		7
Storage temperature	TS	-40		150	°C		7
Magnetic operating point	BOP	6	15	36	Gauss	TA=-40oC to 150oC	7
Magnetic release point	BRP	-36	-15	-6	Gauss	TA=-40oC to 150oC	7
Magnetic hysteresis window	BHYST	12	30	50	Gauss	/BOP-BRP/ TA=-40oC to 150oC	7
Magnetic offset	Bo	-15	0	15	Gauss	BO = (BOP + BRP) / 2 TA=-40oC to 150oC	7
Supply voltage (absolute maximum)	VDD			24	V		5
VDD reverse voltage	VRDD	-22			V		5
Supply current (absolute maximum)	IDD			20	mA		5
Output voltage	VOUT	-0.3		24	V		5
Output current	IOUT			25	mA		5
Operating ambient temperature	TA	-40		150	°C		5
Storage temperature (absolute maximum)	TS	-50		150	°C		5
Junction temperature	TJ	-50		165	°C		5
Thermal resistance, junction to ambient (TO-92S)	RTH		203		°C/W	TO-92S	7

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part	Material	Colour / plating	Datasheet says	Page
contacts		tin	and SOT-89. Each package type is lead (Pb) free (suffix, -T), with a 100% matte-tin-plated lead-frame. Cosemitech CHA44XP/CH44XP	1

CAD (KiCad official)

Symbol: CH441PTB
Footprint: Package_TO_SOT_THT:TO-92_Inline
3D model: TO-92S (KiCad packages3D, STEP)
3D model files: ch441ptb-etched.step / ch441ptb-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ch441ptb.step / ch441ptb.glb are the bare package body.

Provenance

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

Datasheet: COSEMITECH datasheet (15 pp, sha256 fe0b8d7fc332f97d, retrieved 2026-11-05, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

CH441PTB

Verified CH441PTB

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README