# HAL5781SO

**Hallwee** · Hall Switches · SOT-23-3L

HAL5781SO from Hallwee, 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 with a stated operating range of 3.5 to 24 V; the output changes state above 2.2 V, but magnetic characteristics are only specified above 3.5 V. |
| 2 | Gnd | power_in | Ground pin for the device. |
| 3 | Out | output | Open-drain output that goes low (output transistor on) when a sufficiently strong N-pole field reaches BOP (typ. 90 GS) and goes high when the field falls to BRP (typ. 120 GS); VOUT and IOUT absolute maximum ratings are given in the limits table. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Hallwee |
| 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 (operating) | VDD | 3.5 |  | 24 | V |  | 2 |
| Supply current | IDD |  |  | 5 | mA | Working, average value (as printed) | 2 |
| Output leakage current | IOUT |  |  | 10 | uA |  | 2 |
| Saturation voltage | VSAT |  |  | 0.4 | V | IOUT=20mA | 2 |
| Supply voltage | VDD |  |  | 24 | V |  | 2 |
| Supply current | IDD |  |  | 24 | uA |  | 2 |
| Output voltage | VOUT |  |  | 50 | V |  | 2 |
| Output current | IOUT |  |  | 50 | mA |  | 2 |
| Operating temperature range | TA | -40 |  | 150 | ℃ |  | 2 |
| Storage temperature range | TS | -50 |  | 150 | ℃ |  | 2 |
| Electrostatic discharge voltage | VESD |  |  | 4 | KV |  | 2 |
| Operating point | BOP | 40 | 90 | 150 | GS | DC operating parameters: TA=25°C, VDD=12V | 3 |
| Release point | BRP | 40 | 120 |  | GS | DC operating parameters: TA=25°C, VDD=12V | 3 |
| Hysteresis | BHYS | 30 |  | 50 | GS | DC operating parameters: TA=25°C, VDD=12V | 3 |

## CAD (KiCad official)

- Symbol: `HAL5781SO`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files: `hal5781so-etched.step` / `hal5781so-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `hal5781so.step` / `hal5781so.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Hallwee datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603003674260361216) (4 pp, sha256 `728062b8d3f40c60`, retrieved 2026-10-17, 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:** 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](docs/hal5781so-datasheet.pdf)