# MT3401A-EN

**Magn Tek** · Hall Switches · TO-92S

MT3401A-EN from Magn Tek, in a TO-92S. 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 | Supply pin; the datasheet specifies an operating supply voltage of 2.8V to 24V, with an absolute maximum of 27V referenced to GND. |
| 2 | GND | power_in | Ground pin; all absolute maximum voltages are referenced to GND. |
| 3 | OUT | output | Open-drain output that turns Low when B exceeds BOP and High when B falls below BRP; continuous output current is limited to 50 mA and output voltage to 27V maximum. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Magn Tek |
| Package | TO-92S |
| 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 |  |  | 27 | V |  | 4 |
| Reverse Battery Voltage | VRCC | -27 |  |  | V |  | 4 |
| Output Voltage | VOUT |  |  | 27 | V |  | 4 |
| Continuous output current | IOUT |  |  | 50 | mA |  | 4 |
| Operating ambient temperature | TA | -40 |  | 150 | ℃ |  | 4 |
| Storage temperature | TS | -50 |  | 150 | ℃ |  | 4 |
| Junction Temperature | TJ |  |  | 165 | ℃ |  | 4 |
| Supply Voltage Operating | VS | 2.8 |  | 24 | V | Operating | 5 |
| Supply Current | IS | 1 | 2.3 | 3.5 | mA | B< BRP | 5 |
| Output Saturation Voltage | VDSON |  |  | 0.4 | V | IOUT=20mA, B> BOP | 5 |
| Output Leakage Current | IOFF |  |  | 10 | μA | B< BRP, VOUT=24V | 5 |
| Output Rise Time | TR |  |  | 1 | μs | RL=1KOhm,CL=20pF | 5 |
| Output Fall Time | TF |  |  | 1 | μs | RL=1KOhm,CL=20pF | 5 |
| Power On Time | TPO |  |  | 10 | μs | dVS/dt>5V/us，B>BOP(MAX) | 5 |
| Magnetic Operating Point | BOP | 5 | 24 | 40 | Gauss | TA =25℃ | 5 |
| Magnetic Release Point | BRP | -40 | -24 | -5 | Gauss | TA =25℃ | 5 |
| Hysteresis Window | BHYST | 10 | 48 | 80 | Gauss | TA =25℃,/ BOP-BRP/ | 5 |
| Flat TO-92 Package Thermal Resistance | RTH |  | 230 |  | ℃/W |  | 5 |

## CAD (KiCad official)

- Symbol: `MT3401A-EN`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92S (KiCad packages3D, STEP)
- 3D model files: `mt3401a-en-etched.step` / `mt3401a-en-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mt3401a-en.step` / `mt3401a-en.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Magn Tek datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603160717315502080) (12 pp, sha256 `7131e3193d35ad05`, retrieved 2026-10-19, 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/mt3401a-en-datasheet.pdf)