# SS566AT

**Honeywell** · Hall Switches · SOT-89

SS566AT from Honeywell, in a SOT-89. 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 | VS | power_in | Positive supply (Vs +), rated 3.8 Vdc to 30 Vdc, absolute maximum 30 V; a capacitor between output and supply may be needed above 24 Vdc. |
| 2 | GND | power_in | Ground (-), the common return for the supply and the open-collector output transistor. |
| 3 | OUT | output | Open-collector sinking output (O), 20 mA rated continuous sink, 50 mA max, Vsat 0.4 V max, applied output voltage up to 30 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Honeywell |
| Package | SOT-89 |
| 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 (Vs) | Vs | 3.8 |  | 30 | Vdc |  | 2 |
| Current consumption, on (SS500 Series) |  |  |  | 10 | mA | Vs = 30 Vdc, -40°C < T < 150°C, B > operate max. | 2 |
| Current consumption, off (SS500 Series) |  |  |  | 10 | mA | Vs = 30 Vdc, Isink = 20 mA, -40°C < T < 150°C, B > release min. | 2 |
| Vsat (SS500 Series) | Vsat |  |  | 0.4 | V | Vs = 3.8 Vdc, B > operate max. | 2 |
| Output leakage current (SS500 Series) |  |  |  | 10 | uA | Vs = 24 V, Vout = 30 V, B < release min. | 2 |
| Output switching time, rise |  |  |  | 1.5 | us | Vs = 12 V, RL = 1.6 kOhm, CL = 20 pF, T = 25°C [77°F] | 2 |
| Output switching time, fall |  |  |  | 1.5 | us | Vs = 12 V, RL = 1.6 kOhm, CL = 20 pF, T = 25°C [77°F] | 2 |
| Operating temperature |  | -40 |  | 150 | °C |  | 2 |
| Storage temperature |  | -50 |  | 150 | °C |  | 2 |
| Soldering temperature, wave soldering |  | 250 |  | 260 | °C | wave soldering process, 3 s max. | 2 |
| Soldering temperature, infrared reflow |  |  |  | 245 | °C | infrared reflow process, peak temperature, 10 s max. | 2 |
| Supply voltage (Vs) | Vs | -1 |  | 30 | V |  | 3 |
| Applied output voltage (Vout), SS500 Series (off) | Vout |  |  | 30 | V | SS500 Series (off) | 3 |
| Output current (Isink) | Isink |  |  | 50 | mA | Vs = -1 Vdc to 24 Vdc | 3 |
| Output current (Isink) | Isink |  |  | 37 | mA | Vs = 24 Vdc to 25 Vdc | 3 |
| Output current (Isink) | Isink |  |  | 33 | mA | Vs = 25 Vdc to 26 Vdc | 3 |
| Output current (Isink) | Isink |  |  | 28 | mA | Vs = 26 Vdc to 27 Vdc | 3 |
| Output current (Isink) | Isink |  |  | 24 | mA | Vs = 27 Vdc to 28 Vdc | 3 |
| Output current (Isink) | Isink |  |  | 19 | mA | Vs = 28 Vdc to 29 Vdc | 3 |
| Output current (Isink) | Isink |  |  | 15 | mA | Vs = 29 Vdc to 30 Vdc | 3 |
| Magnetic operate point (SS566AT) | Bop | 100 |  | 200 | Gauss | -40°C [-40°F] | 4 |
| Magnetic release point (SS566AT) | Brp | -200 |  | -100 | Gauss | -40°C [-40°F] | 4 |
| Magnetic differential (SS566AT) |  | 200 |  |  | Gauss | -40°C [-40°F] | 4 |
| Magnetic operate point (SS566AT) | Bop | 100 |  | 185 | Gauss | 0°C [0°F] | 4 |
| Magnetic release point (SS566AT) | Brp | -185 |  | -100 | Gauss | 0°C [0°F] | 4 |
| Magnetic operate point (SS566AT) | Bop | 100 |  | 180 | Gauss | 25°C [77°F] | 4 |
| Magnetic release point (SS566AT) | Brp | -180 |  | -100 | Gauss | 25°C [77°F] | 4 |
| Magnetic operate point (SS566AT) | Bop | 95 |  | 180 | Gauss | 85°C [185°F] | 4 |
| Magnetic release point (SS566AT) | Brp | -180 |  | -95 | Gauss | 85°C [185°F] | 4 |
| Magnetic differential (SS566AT) |  | 190 |  |  | Gauss | 85°C [185°F] | 4 |
| Magnetic operate point (SS566AT) | Bop | 80 |  | 180 | Gauss | 125°C [257°F] | 4 |
| Magnetic release point (SS566AT) | Brp | -180 |  | -80 | Gauss | 125°C [257°F] | 4 |
| Magnetic differential (SS566AT) |  | 160 |  |  | Gauss | 125°C [257°F] | 4 |
| Magnetic operate point (SS566AT) | Bop | 70 |  | 185 | Gauss | 150°C [302°F] | 4 |
| Magnetic release point (SS566AT) | Brp | -185 |  | -70 | Gauss | 150°C [302°F] | 4 |
| Magnetic differential (SS566AT) |  | 140 |  |  | Gauss | 150°C [302°F] | 4 |

## CAD (KiCad official)

- Symbol: `SS566AT`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files: `ss566at-etched.step` / `ss566at-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ss566at.step` / `ss566at.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Honeywell datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588898176871251968) (11 pp, sha256 `5ff8b87951167aa6`, retrieved 2026-10-19, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+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/ss566at-datasheet.pdf)