# CH412SR

**COSEMITECH** · Linear Hall Sensors · SOT-23

CH412SR from COSEMITECH, in a SOT-23. 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, operating range 3.5V to 30V with reverse-battery protection (absolute maximum 40V, reverse -40V). |
| 2 | OUT | output | Open-collector output pin, sinks up to 20 mA operating (absolute maximum 50 mA, -0.3V to 40V), turns low at Bop and high at Brp. |
| 3 | GND | power_in | Ground pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | COSEMITECH |
| Package | SOT-23 |
| Category | Magnetic Sensors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `CH412SR`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `ch412sr-etched.step` / `ch412sr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ch412sr.step` / `ch412sr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [COSEMITECH datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757120420594233344) (13 pp, sha256 `b93038ac18ea5c06`, retrieved 2026-11-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (vision), consensus `claude-opus-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](docs/ch412sr-datasheet.pdf)