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High Voltage Low Sensitivity Automotive Hall Effect Unipolar Switch

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The AH3390Q is an AECQ100 qualified high voltage low sensitivity Hall Effect Unipolar switch IC designed for position and proximity sensing in automotive applications such as in seat and seatbelt buckle , steering lock/immobilisation, gear stick , transmission actuator and gear position, HVAC compression, wiper, door/trunk closure, etc. To support wide range of demanding applications, the design has been optimized to operate over the supply range of 3.0V to 28V. With chopper stabilized architecture and an internal bandgap regulator to provide temperature compensated supply for internal circuits, the AH3390Q provides a reliable solution over the whole operating range. For robustness and protection, the device has a reverse blocking diode with a Zener clamp on the supply. The output has an over current limit and a Zener clamp.

The single open drain output can be switched on with South pole of sufficient strength. When the magnetic flux density (B) perpendicular to the package is larger than the operate point (BOP) the output is switched on (pulled low) and is held on until magnetic flux density B is lower than the release point (BRP). The output remains switched off for North pole fields to or no magnetic fields.

The magnetic operating and release polarity is opposite for SOT23 and SC59 packages. The SOT23 and SIP-3 (Ammo Pack), SIP-3 (Bulk Pack) packages require south pole to the part marking side to operate while SC59 requires south pole to the non-part marking side.


  • Position and Proximity Sensing in Automotive Applications
  • Seat Position
  • Seatbelt Buckle 
  • Steering Lock/Immobilisation
  • Gear Stick
  • HVAC Compression
  • Transmission Actuator
  • Transmission Gear position
  • Wipers
  • Sunroof and Windows
  • Door/Trunk Closure
  • Door Locks
  • Contact-less switches


  • Unipolar Operation
  • High Sensitivity: Bop and Brp of +210G and +185G Typical
  • Single Open Drain Output with Over Current Limit
  • 3.0V to 28V Operating Voltage Range
  • Chopper Stabilized Design Provides
  • Superior Temperature Stability
  • Minimal Switch Point Drift
  • Enhanced Immunity to Stress
  • Good RF Noise Immunity
  • Reverse Blocking Diode
  • Zener Clamp on Supply and Output Pins
  • -40°C to +125°C Operating Temperature
  • ESD: HBM > 6kV
  • Industry Standard SOT23 and SIP-3 Packages
  • Totally Lead-Free & Fully RoHS Compliant
  • Halogen and Antimony Free. “Green” Device

Product Specifications

Product Parameters

Qualified to AECQ10x Yes
Automotive Compliant PPAP Yes
Output Type Single Open Drain, Active Low
Operating Voltage 3 to 28 V
Average Supply Current 3 mA
Grade Automotive Grade 0 AECQ100
Operating Point Bop (Bops +ve/ Bopn -ve) Gauss (Min) 180
Operating Point Bop (Bops +ve/ Bopn -ve) Gauss (Typ) 210
Operating Point Bop (Bops +ve/ Bopn -ve) Gauss (Max) 240
Release Point Brp (Brps +ve/Brpn -ve) Gauss (Min) 155
Release Point Brp (Brps +ve/Brpn -ve) Gauss (Typ) 185
Release Point Brp (Brps +ve/Brpn -ve) Gauss (Max) 220
Operating Ambient Temperature -40 to 150 °C

Related Content

SIP-3 (Ammo)
SIP-3 (Bulk)


Technical Documents

Recommended Soldering Techniques


Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AH3390Q-P-A Mouser Electronics Inc. 4000 8/3/2020 Buy Now United States
AH3390Q-P-B Mouser Electronics Inc. 1888 8/3/2020 Buy Now United States
AH3390Q-P-B Digi-Key Electronics 387 8/2/2020 Buy Now United States
AH3390Q-P-B Farnell, An Avnet Company 212 8/2/2020 Buy Now England
AH3390Q-P-B RS Components 1230 8/2/2020 Buy Now England
AH3390Q-P-B RS Components Ltd. 1230 8/2/2020 Buy Now Japan
AH3390Q-SA-7 Mouser Electronics Inc. 3620 8/3/2020 Buy Now United States
AH3390Q-SA-7 Digi-Key Electronics 2661 8/2/2020 Buy Now United States
AH3390Q-SA-7 Farnell, An Avnet Company 2906 8/2/2020 Buy Now England
AH3390Q-SA-7 RS Components 5970 8/2/2020 Buy Now England
AH3390Q-SA-7 RS Components Ltd. 5970 8/2/2020 Buy Now Japan
AH3390Q-W-7 Mouser Electronics Inc. 3000 8/3/2020 Buy Now United States