# CH443SR

**COSEMITECH** · Hall Switches · SOT-23

CH443SR from COSEMITECH, 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 | VDD | power_in | Supply voltage pin rated 2.5V to 22V with integrated regulator and reverse battery protection to -22V. |
| 2 | OUT | tri_state | Open-drain Hall sensor output pin rated to sink 30 mA with short-circuit protection limiting current to 30-90 mA. |
| 3 | GND | power_in | Ground return pin. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `CH443SR`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `ch443sr-etched.step` / `ch443sr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ch443sr.step` / `ch443sr.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/8590235764580777984) (15 pp, sha256 `bb180a03995d8124`, retrieved 2026-09-21, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/ch443sr-datasheet.pdf)