Diodes Menu Close
Back to Omnipolar Hall Effect Switches


Medium Sensitivity Micropower Omnipolar Hall Effect Switch

Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.


The AH9251 is a medium sensitivity micropower Omnipolar hall-effect switch ICs, specifically designed for portable and battery powered consumer equipment, to home appliances and industrial applications.

Based on High/Medium sensitivity hall effect plates and chopper stabilized architecture, the AH9251 provides a reliable solution over the whole operating range.

The high and Medium sensitivity hall effect switches have been optimized to operate over the supply range of 2.5V to 5.5V and use a micropower sleep function to give an average supply current of only 8uA.

AH9251 has push pull output for flexibility.They are small low profile industry standard SC59 and TO92S packages.


  • Handheld Wireless Application Awake Switch
  • Doors, Lids, Covers and Tray Position Detect Switches
  • Liquid Level Detection
  • Battery Powered Consumer, Home Appliances and Industrial Applications


  • Omnipolar Operation (Switching with North or South Poles)
  • Micropower Operation
  • Built in Pull-up Resistor on the Output
  • 2.5V to 5.5V Power Supply
  • Stabilized Chopper
  • Superior Temperature Stability
  • Digital Output Signal
  • -40°C to +85°C Operating Temperature
  • ESD (HBM): 5000V
  • Small Low Profile Industry Standard SC59 and TO92S Packages
  • Totally Lead-Free & Fully RoHS Compliant
  • Halogen and Antimony Free. “Green” Device

Product Specifications

Product Parameters

Qualified to AECQ10x No
Automotive Compliant PPAP No
# Outputs 1
Output Type Internal Pull-Up
Active High or Low Low
Sensitivity Medium
Operating Voltage 2.5 to 5.5 V
Average Supply Current 8 µA
Min Operating Point ±Bop (Guass) 40
Typ Operating Point ±Bop (Guass) 60
Max Operating Point ±Bop (Guass) 80
Min Release Point ±Brp (Guass) 30
Typ Release Point ±Brp (Guass) 50
Max Release Point ±Brp (Guass) 70
Operating Ambient Temperature Range -40 to 85 °C

Related Content

TO92S (Type B)


Technical Documents

Recommended Soldering Techniques


Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AH9251-W-7 Arrow Electronics 1520 8/11/2020 Buy Now United States
AH9251-W-7 Digi-Key Electronics 3425 8/11/2020 Buy Now United States
AH9251-W-7 Mouser Electronics Inc. 59 8/11/2020 Buy Now United States


Related Application FAQs