Honeywell SS466A Bipolar Hall Effect Magnetic Sensor - 100 G to 180 G Operating Point, 20mA Output

Name: Honeywell SS466A Bipolar Hall Effect Magnetic Sensor - 100 G to 180 G Operating Point, 20mA Output
Brand: Honeywell
SKU: SENS-0979
Price: 104.00 INR
Availability: OutOfStock

₹104.00 (Inclusive of all taxes)

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The Honeywell SS466A is a bipolar digital Hall-effect sensor IC designed for board mounting, featuring a 100 G to 180 G operating point and a 20mA maximum output current. It is compatible with 3V to 24V DC systems and is engineered for stable operation across an industrial temperature range of -40°C to 150°C.

Features

Bipolar digital Hall-effect sensor with a 100 G to 180 G operating point range.
Wide supply voltage range from 3V to 24V DC, suitable for low-voltage and industrial applications.
Maximum output current of 20mA for direct interface with logic circuits, relays, or indicators.
Extended operating temperature range from -40°C to 150°C for harsh environment reliability.
Compact SOT-23 surface-mount package for automated placement and space-constrained designs.

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Description

The Honeywell SS466A is a solid-state digital Hall-effect sensor that provides a reliable switching output in response to a magnetic field. Its bipolar design requires both a positive (south pole) and negative (north pole) magnetic field to operate, making it ideal for applications involving alternating magnetic poles, such as rotary encoding or speed sensing.

Engineered for stability, the device maintains consistent switching points across the full -40°C to 150°C temperature range, ensuring dependable performance in automotive, industrial, and appliance applications. The integrated output transistor can sink up to 20mA, allowing direct drive of LEDs, small relays, or microcontroller inputs without additional buffering.

Key Features

Bipolar magnetic switching for direction or speed detection applications.
Broad 3V to 24V DC supply range supports diverse system voltages.
Robust 20mA open-collector output for direct load interfacing.
High-temperature resilience up to 150°C for under-hood or near-motor placement.
Miniature SOT-23 surface-mount package enables high-density PCB designs.
Low 10mA typical operating current promotes energy-efficient designs.
Specified magnetic operating point ensures repeatable switching thresholds.

Applications

Brushless DC (BLDC) motor commutation and speed detection.
Rotary encoder and position sensing in industrial equipment.
Lid, door, or cover closure detection in appliances and safety interlocks.
Proximity and non-contact switching in automotive systems.
Flow meter and tachometer applications requiring bipolar magnetic sensing.

Technical Specifications

Manufacturer Part Number	SS466A
Sensor Type	Digital Bipolar Hall-Effect
Operating Point	100 G to 180 G
Supply Voltage	3 V to 24 V DC
Operating Current	10 mA (typical)
Maximum Output Current	20 mA
Output Type	Open Collector
Operating Temperature	-40°C to 150°C
Package Type	SOT-23 Surface Mount

Frequently Asked Questions

What is the difference between unipolar and bipolar Hall-effect sensors, and why choose the SS466A?

A unipolar sensor responds to a single magnetic pole, while a bipolar sensor like the SS466A requires both a south and north pole to switch on and off. This makes the SS466A ideal for sensing alternating magnetic fields in applications like rotary encoding, BLDC motor commutation, or speed sensing where the magnet rotates.

What is the maximum load I can drive directly with the SS466A's output?

The SS466A features an open-collector output capable of sinking up to 20mA. This allows it to directly drive small loads like LEDs, optocouplers, or the coil of a miniature relay. For larger loads, an external transistor or MOSFET should be used as a buffer.

How do I determine the correct magnet strength for reliable operation with this sensor?

The SS466A is specified to operate with a magnetic flux density between 100 Gauss and 180 Gauss. You must select a magnet that, at the intended sensing distance (air gap), produces a field strength within this range. Exceeding the maximum may not damage the sensor, but staying within the specified operating point ensures reliable switching.

Can the SS466A be used with 3.3V microcontroller systems like Arduino or Raspberry Pi?

Yes, the SS466A's wide 3V to 24V supply range includes 3.3V operation. Its open-collector output can be connected to a microcontroller GPIO pin with a pull-up resistor to 3.3V. Ensure the output current does not exceed the microcontroller's pin sink capability, typically safe given the sensor's 20mA max output.