# MT8651A

**Magn Tek** · Hall Switches · TO-92S

MT8651A 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 | Vcc | power_in | Supply pin, operating range 2.0 V to 5.5 V, with an absolute maximum supply voltage of 7 V and reverse battery voltage of -0.5 V. |
| 2 | GND | power_in | Ground reference pin for the device. |
| 3 | OUT | output | Open-drain output that pulls Low when |B| exceeds BOP and goes High when |B| falls below BRP; continuous output current is limited to 8 mA absolute maximum and VOL is 0.4 V max at 5 mA. |

## 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 Current (BOP/BRP) Awake Current, VCC=3.6V | IAW |  | 3 | 4 | mA | VCC=3.6V | 5 |
| Supply Current | ICC |  | 1.2 | 2 | uA | VCC=3.6V | 5 |
| Sleep Current | ISL |  | 0.6 | 1.4 | uA | VCC=3.6V | 5 |
| Output Low Voltage | VOL |  |  | 0.4 | V | IOUT=5mA, /B/>/BOP/ | 5 |
| Switching Frequency | FSW | 10 | 20 | 40 | Hz | VCC=3.6V | 5 |
| Awake Time | TAW | 4 | 10 | 16 | us | VCC=2.0V to 5.5V | 5 |
| Sleep Time | TSL | 25 | 50 | 100 | ms | VCC=2.0V to 5.5V | 5 |
| Power on Time | TPO |  |  | 120 | us | dVcc/dt>5V/us, /B/>/BOP/ | 5 |
| Operating Point (MT8651 series) | BOP | 17 | 37 | 55 | Gs | TA =25℃ | 5 |
| Releasing Point (MT8651 series) | BRP | 10 | 25 | 40 | Gs | TA =25℃ | 5 |
| Hysteresis Window (MT8651 series) | BHYST | 3 | 12 | 18 | Gs | TA =25℃ | 5 |
| Supply Voltage | VCC | 2 | 3.6 | 5.5 | V | Operating | 5 |
| Thermal Resistance of Flat TO-92 | RTH |  | 230 |  | ℃/W |  | 5 |
| Supply Voltage | VCC |  |  | 7 | V |  | 4 |
| Reverse Battery Voltage | VRCC | -0.5 |  |  | V |  | 4 |
| Output Voltage | VOUT |  |  | 7 | V |  | 4 |
| Continuous Output Current | IOUT |  |  | 8 | mA |  | 4 |
| Operating Ambient Temperature | TA | -40 |  | 125 | ℃ |  | 4 |
| Storage Temperature | TS | -50 |  | 150 | ℃ |  | 4 |
| Junction Temperature | TJ |  |  | 165 | ℃ |  | 4 |

## CAD (KiCad official)

- Symbol: `MT8651A`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92S (KiCad packages3D, STEP)
- 3D model files: `mt8651a-etched.step` / `mt8651a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mt8651a.step` / `mt8651a.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/8758144776166490112) (10 pp, sha256 `a797b4ec675d53c2`, retrieved 2026-10-17, 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/mt8651a-datasheet.pdf)