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CH941SR
Public Made by Adomby adom
COSEMITECH Hall Switches, SOT-23-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownCH941SR
COSEMITECH · Hall Switches · SOT-23-3L
CH941SR from COSEMITECH, in a SOT-23-3L. 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 datasheet specifies operation from 3.3 V to 30 V (supply voltage range -40 °C to 150 °C) and a reverse voltage rating of -40 V. |
| 2 | OUT | output | Open collector output pin; output saturation voltage is 0.4 V max at 20 mA, output leakage is 10 µA max with B < 50 Gs, and the output voltage and output current maximums are 40 V and 20 mA. |
| 3 | GND | power_in | Ground pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | COSEMITECH |
| Package | SOT-23-3L |
| Category | Magnetic 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 | 40 | V | 3 | |||
| Reverse Voltage | VRDD | -40 | V | 3 | |||
| Supply Current | IDD | 20 | mA | 3 | |||
| Output Voltage | VOUT | 40 | V | 3 | |||
| Output Current | IOUT | 20 | mA | 3 | |||
| Operating Ambient Temperature | TA | -40 | 150 | °C | 3 | ||
| Storage Temperature | TS | -50 | 150 | °C | 3 | ||
| Junction temperature | TJ | -50 | 165 | °C | 3 | ||
| ESD HBM | -2000 | 2000 | V | All pins, HBM (100pF, 1.5 kohm), MIL-STD-883H 3015.8 | 4 | ||
| ESD MM | -200 | 200 | V | All pins, MM (200pF, 0 ohm), JEDEC EIA/JESD22-A115 | 4 | ||
| ESD CDM | -750 | 750 | V | All pins, CDM, JEDEC EIA/JESD22-C101F | 4 | ||
| Supply voltage | VDD | 3.3 | 30 | V | -40 °C to 150 °C | 5 | |
| Supply Current | IDD | 3.5 | 8 | mA | VDD = 5V | 5 | |
| Output saturation voltage | VDSon | 0.4 | V | at 20mA, Gauss >200 | 5 | ||
| Output Leakage Current | IOFF | 10 | uA | B<50GS | 5 | ||
| Output rise time | TR | 1.5 | uS | VDD =12V at 25 °C, CL= 20 pF | 5 | ||
| Output fall time | TF | 1.5 | uS | VDD =12V at 25 °C, CL= 20 pF | 5 | ||
| Magnetic operating point | BOP | 100 | 140 | 190 | Gauss | TA=25°C | 5 |
| Magnetic release point | BRP | 70 | 110 | 140 | Gauss | TA=25°C | 5 |
| Magnetic hysteresis window | BHYST | 20 | 30 | 60 | Gauss | TA=25oC, /BOP-BRP/ | 5 |
| Maximum Switching Frequency | FSW | 100 | KHz | 5 | |||
| Operating temperature | T | -40 | 150 | °C | 5 | ||
| Storage temperature | TS | -40 | 150 | °C | 5 | ||
| Thermal resistance, CH941S (SOT-23-3L) | RTH | 303 | °C /W | CH941S (SOT-23-3L) | 5 |
CAD (KiCad official)
- Symbol:
CH941SR - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files:
ch941sr-etched.step/ch941sr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ch941sr.step/ch941sr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: COSEMITECH datasheet (10 pp, sha256
baa1219653710720, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).