component
MH251EUA
Public Made by Adomby adom
MST Magnesensor Tech MST Hall Switches, TO-92S. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownMH251EUA
MST Magnesensor Tech MST · Hall Switches · TO-92S
MH251EUA from MST Magnesensor Tech MST, 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 | VDD | power_in | Supply pin; the MH251 operates from 1.65 V to 3.5 V, and the absolute maximum supply voltage is 4.5 V. |
| 2 | GND | power_in | Ground reference pin for the supply and the totem-pole output. |
| 3 | Out | output | Totem-pole CMOS output that switches on and off with the magnetic field; the output current is limited to 1 mA absolute maximum. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MST Magnesensor Tech MST |
| 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 (VDD) Operating | VDD | 1.65 | 3.5 | V | Operating | 3 | |
| Operate Point BOPS (S pole to branded side) | BOPS | 30 | 55 | Gauss | S pole to branded side, B > BOP, Vout On | 3 | |
| Operate Point BOPN (N pole to branded side) | BOPN | -55 | -30 | Gauss | N pole to branded side, B > BOP, Vout On | 3 | |
| Release Point BRPS (S pole to branded side) | BRPS | 10 | 20 | Gauss | S pole to branded side, B < BRP, Vout Off | 3 | |
| Release Point BRPN (N pole to branded side) | BRPN | -20 | -10 | Gauss | N pole to branded side, B < BRP, Vout Off | 3 | |
| Hysteresis | BHYS | 10 | Gauss | /BOPx - BRPx/ | 3 | ||
| Supply Current (IDD) Awake State | IDD | 1.4 | 3 | mA | 3 | ||
| Supply Current (IDD) Sleep State | IDD | 3.6 | 7 | μA | 3 | ||
| Supply Current (IDD) Average | IDD | 5 | 10 | μA | 3 | ||
| Output Leakage Current | Ioff | 1 | uA | Output off | 3 | ||
| Output Low Voltage | VOL | 0.2 | V | IOUT=0.5mA(Sink) | 3 | ||
| Awake mode time | Taw | 40 | 80 | uS | Operating | 3 | |
| Sleep mode time | TSL | 40 | 80 | mS | Operating | 3 | |
| Electro-Static Discharge | 4 | KV | HBM | 3 | |||
| Supply Voltage (VDD) Absolute Maximum | VDD | 4.5 | V | 3 | |||
| Output Voltage (Vout) Absolute Maximum | Vout | 4.5 | V | 3 | |||
| Reverse Voltage (VDD) (VOUT) | VDD, VOUT | -0.3 | V | 3 | |||
| Output Current (IOUT) | IOUT | 1 | mA | 3 | |||
| Operating Temperature Range (Ta) | Ta | -40 | 85 | ℃ | 3 | ||
| Storage Temperature Range (Ts) | Ts | -65 | 150 | ℃ | 3 | ||
| Maximum Junction Temperature (Tj) | Tj | 150 | ℃ | 3 | |||
| Package Power Dissipation (PD) | PD | 606 | mW | UA (TO-92S) package | 3 | ||
| Duty Cycle | D.C. | 0.1 | % | 3 | |||
| Thermal Resistance Junction-to-Ambient (θJA) | θJA | 206 | ℃/W | UA (TO-92S) package | 3 | ||
| Thermal Resistance Junction-to-Case (θJC) | θJC | 148 | ℃/W | UA (TO-92S) package | 3 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | UA:TO-92S,VK:TO-92S(4pin),VF:TO-92S(5pin),SO:SOT-23, SQ:QFN-3,ST:TSOT-23,SN:SOT-553,SF:SOT-89(5pin) | 2 |
CAD (KiCad official)
- Symbol:
MH251EUA - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92S (KiCad packages3D, STEP)
- 3D model files:
mh251eua-etched.step/mh251eua-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mh251eua.step/mh251eua.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MST Magnesensor Tech MST datasheet (6 pp, sha256
a4d230726c918181, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).