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Honeywell SS543AT Unipolar Hall Effect Magnetic Sensor - 3V DC, 110-180 G Operating Point

₹73.00 (Inclusive of all taxes)
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The Honeywell SS543AT is a unipolar, board-mount Hall-effect magnetic sensor IC designed for low-voltage (3V DC) applications, offering a compact solution for motion control, lid detection, and displacement sensing in industrial and embedded systems.

Features

  • Unipolar Hall-effect sensor with a magnetic operating point range of 110 G to 180 G.
  • Low-voltage operation at 3V DC, suitable for energy-efficient designs.
  • Wide operating temperature range from -40°C to 150°C for stable performance in harsh environments.
  • Digital output with a maximum output current of 20 mA for direct interface with microcontrollers.
  • Compact SOT-23 surface-mount package for automated placement and space-constrained assemblies.

Out of stock

Description

The Honeywell SS543AT is a digital Hall-effect sensor IC that activates in the presence of a sufficient south magnetic pole, providing a reliable digital output signal. Its unipolar design simplifies system integration for applications requiring proximity or position detection based on a single magnetic polarity.

Engineered for stability across a broad temperature spectrum, this sensor is ideal for automotive, industrial, and consumer electronics where consistent performance under varying thermal conditions is critical. The 3V DC capability makes it compatible with modern low-power microcontrollers and battery-operated devices.

Key Features

  • Unipolar magnetic activation simplifies design and reduces false triggering.
  • Low operating supply current of 8.7 mA promotes energy efficiency.
  • Robust construction ensures reliable operation from -40°C to 150°C.
  • SOT-23 surface-mount package enables high-density PCB layouts and automated assembly.
  • Digital output provides clean switching signals for direct microcontroller input.
  • Optimized for motion sensing, lid/closure detection, and linear displacement measurement.

Applications

  • Brushless DC (BLDC) motor commutation and speed sensing.
  • Reed switch replacement in lid, door, and cover position detection systems.
  • Linear and rotary displacement sensing in industrial automation.
  • Proximity and presence detection in consumer appliances and automotive systems.
  • Low-power, battery-operated position feedback devices.

Technical Specifications

Manufacturer Part Number (MPN)SS543AT
Sensor TypeUnipolar Hall Effect
Operating Supply Voltage3 V DC
Operating Supply Current8.7 mA
Maximum Output Current20 mA
Magnetic Operating Point (Min)110 G
Magnetic Operating Point (Max)180 G
Operating Temperature Range-40°C to 150°C
Package TypeSOT-23 (Surface Mount)
Output TypeDigital

Frequently Asked Questions

What is the operating voltage range for the Honeywell SS543AT sensor?

The SS543AT is designed for a 3V DC supply. While its datasheet specifies 3V operation, it is crucial to consult the official Honeywell documentation for absolute maximum ratings and recommended operating conditions to ensure reliable performance and avoid damage.

How does the unipolar magnetic activation work?

A unipolar Hall-effect sensor like the SS543AT activates (switches its output) only when exposed to a magnetic field of a specific polarity (typically a south pole) that exceeds its operating point threshold (110-180 G). It remains inactive in the absence of a field or when exposed to the opposite magnetic pole.

Can this sensor be used for speed measurement in motors?

Yes, the SS543AT is suitable for speed sensing in brushless DC (BLDC) motors or other rotating assemblies. By detecting a magnet attached to a rotor, its digital output pulses can be counted or timed by a microcontroller to calculate rotational speed (RPM).

What is the output signal type and how do I interface it?

The SS543AT provides a digital output. When the magnetic field exceeds the operating point, the output switches state (typically to a logic low). This signal can be connected directly to a microcontroller's digital input pin, with appropriate pull-up/pull-down resistors as specified in the datasheet.

Package Includes

  • 1 x Honeywell SS543AT Unipolar Hall Effect Sensor

Additional Information

Weight 0.11 kg
Dimensions 8 × 6 × 3 cm