# SM353RT

**Honeywell** · Hall Switches · SOT-23

SM353RT from Honeywell, 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 | VCC | power_in | Supply voltage input, specified at 3 V to 24 V (12 V typical) referenced to ground, with absolute maximum supply voltage of -26 V to 26 V. |
| 2 | OUTPUT | output | Open-collector output that sinks up to 40 mA maximum, with output saturation voltage of 500 mV maximum at 20 mA load and output leakage current of 10 µA maximum when off. |
| 3 | GND | power_in | Ground (-) reference for the supply voltage and all electrical specifications. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Honeywell |
| Package | SOT-23 |
| 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 (Vcc) | Vcc | 3 | 12 | 24 | V | Vcc reference to ground | 2 |
| Output leakage current |  |  |  | 10 | µA | Vcc = 24, off | 2 |
| Output saturation voltage |  |  |  | 500 | mV | load current = 20 mA | 2 |
| Start-up time |  |  |  | 10 | µs | Vcc > 3 V | 2 |
| Rise time |  |  |  | 1.5 | µs | Vcc = 5 V, R = 2 kOhm, C = 20 pF | 2 |
| Fall time |  |  |  | 1.5 | µs | Vcc = 5 V, R = 2 kOhm, C = 20 pF | 2 |
| Operate (positive) |  | 6 | 14 | 20 | Gauss | SM353RT, SM453R | 2 |
| Release (positive) |  | 3 | 9.3 | 18 | Gauss | SM353RT, SM453R | 2 |
| Differential |  |  | 5.7 |  | Gauss | SM353RT, SM453R | 2 |
| Operating temperature ambient | Ta | -40 |  | 85 | °C |  | 2 |
| Soldering temperature |  |  |  | 245 | °C | SM351RT, SM353RT; ambient applied for < 10 s | 2 |
| Supply voltage (Vs) | Vs | -26 |  | 26 | V |  | 2 |
| Load current output sinking (open collector) |  |  |  | 40 | mA |  | 2 |

## CAD (KiCad official)

- Symbol: `SM353RT`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `sm353rt-etched.step` / `sm353rt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sm353rt.step` / `sm353rt.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/8588919442596646912) (8 pp, sha256 `bbabad3cbc2f0549`, retrieved 2026-10-18, tier: lcsc)
- **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/sm353rt-datasheet.pdf)