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Diodes Pericom: A product line of Diodes Incorporated


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)


Quality & Reliability

Technical Documents

Recommended Soldering Techniques
Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AH9251-P-B Arrow Electronics 895 7/22/2019 Buy Now Americas
AH9251-P-B Digi-Key Electronics 2040 7/22/2019 Buy Now Americas
AH9251-P-B Mouser Electronics Inc. 1844 7/22/2019 Buy Now Americas
AH9251-W-7 Arrow Electronics 2600 7/22/2019 Buy Now Americas
AH9251-W-7 Digi-Key Electronics 2103 7/22/2019 Buy Now Americas
AH9251-W-7 Mouser Electronics Inc. 3544 7/22/2019 Buy Now Americas


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