Bipolar Hall Switches

Bipolar Hall switches are specialized electronic components that exhibit consistent hysteresis behavior. Hysteresis refers to the tendency of these switches to maintain their current state until a certain threshold is crossed in the opposite direction. However, it’s important to note that individual units of these switches may have their switchpoints occurring either in relatively more positive or more negative magnetic field ranges.
CategoryModelOperating VoltageReverse VoltageMagnetic Operate PointMagnetic Release PointOperating Temperature RangePackageAlternative toDocument
Bipolar Hall SwitchesHK54y2.7V-30V-20V 40-40-40 to 150°CSOT23 TO92SA1204/HAL1561Download
Bipolar Hall SwitchesHK5422.7V-30V-20V120-120-40 to 150°CSOT23 TO92S Allegro A1212/HAL1562Download
Bipolar Hall SwitchesHK4692.7V-5.5V-0.3V25-25-40 to 85°CSOT23 TO92S-Download
Bipolar Hall SwitchesHK402H3.0V-60V-60V25-25-40to150°CSOT23 TO92SSS360/EW612B/SDC177Download

Advantages of bipolar Hall switches:

Low Magnetic Signal Amplitude Requirement (ΔB): These switches require minimal changes in the magnetic field strength (ΔB) to trigger a switching event. This is crucial in situations where the magnetic field alternates between north and south poles, as the consistent hysteresis ensures reliable switching even with small variations in the magnetic signal.

Polarity Alternation for Switching: The alternating magnetic field polarity effectively serves as a natural trigger for the bipolar Hall switches. As the field switches back and forth between north and south poles, these switches respond by changing their states accordingly.

Periodicity and Reliability: Thanks to their consistent hysteresis, bipolar Hall switches offer periodic and reliable switching behavior. This predictability is crucial in applications where precise control over switching events is required.


Bipolar Hall switches are specialized devices ideal for situations involving alternating magnetic field polarities. Their consistent hysteresis and ability to operate with minimal changes in magnetic signal amplitude make them valuable components in a range of applications where reliable and periodic switching is essential.