SKU: SENS-0984
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Honeywell SS443A Unipolar Hall Effect Magnetic Sensor - TO-92-Flat-3 Package

₹101.00 (Inclusive of all taxes)
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The Honeywell SS443A is a unipolar digital Hall-effect sensor in a TO-92-Flat-3 package, designed for board mounting and triggered by a South magnetic pole. It features a wide 3.8V to 30V DC supply range and an open-collector output, making it compatible with a broad range of digital logic and control circuits.

Features

  • Unipolar digital Hall-effect sensor activated by a South magnetic pole.
  • Wide operating supply voltage range from 3.8 Vdc to 30 Vdc.
  • Open-collector output capable of sinking up to 20 mA continuously.
  • Extended operating temperature range from -40°C to +150°C.
  • Compact TO-92-Flat-3 through-hole package for automated placement.

Out of stock

Description

The Honeywell SS443A is a versatile, board-mount digital Hall-effect sensor designed for reliable magnetic field detection. It operates on a unipolar principle, requiring only a single magnetic South pole to activate its open-collector digital output. An integrated voltage regulator ensures stable performance across its broad 3.8V to 30V DC input range, accommodating both low-voltage and industrial applications.

Engineered for durability, the sensor is qualified for operation in harsh environments with a temperature range spanning from -40°C to +150°C. The TO-92-Flat-3 package facilitates automated PCB assembly, while the digital output provides a clean, easily interfaced signal for motion sensing, position detection, and state monitoring in electronic control systems.

Key Features

  • Unipolar magnetic response simplifies system design for single-pole detection.
  • On-board voltage regulation for stable operation across wide supply variations.
  • High-temperature capability up to 150°C for demanding industrial environments.
  • Open-collector digital output for easy interface with microcontrollers, PLCs, and logic circuits.
  • Compact, industry-standard TO-92 package optimized for cost-effective, automated PCB assembly.
  • Continuous 20 mA output sink current supports direct driving of LEDs, relays, or optocouplers.

Applications

  • Brushless DC (BLDC) motor commutation and speed detection.
  • Reed switch replacement in appliance lid/door closure detection.
  • Linear and rotary position sensing in industrial automation.
  • Proximity and presence detection in security and safety interlocks.
  • Revolution counting and speed monitoring in automotive and consumer electronics.

Technical Specifications

Manufacturer Part NumberSS443A
Sensor TypeUnipolar Digital Hall-Effect
Operating Point110 G to 180 G
Supply Voltage3.8 Vdc to 30 Vdc
Operating Current10 mA
Output TypeOpen Collector, Sinking
Max Output Current (Continuous)20 mA
Package / CaseTO-92-Flat-3
Mounting TypeThrough Hole
Operating Temperature-40°C to +150°C

Frequently Asked Questions

What is the difference between unipolar and bipolar Hall-effect sensors?

A unipolar sensor, like the SS443A, is activated by a single magnetic pole (typically South) and deactivates when the field is removed. A bipolar sensor requires alternating North and South poles to switch its output state, and a latching sensor maintains its state until the opposite pole is applied.

What is the maximum voltage I can apply to the SS443A sensor?

The SS443A has a wide operating supply voltage range from 3.8 Vdc to 30 Vdc. The on-board regulator ensures stable performance across this entire range, making it suitable for both low-voltage microcontroller systems and higher-voltage industrial controls.

How do I interface the open-collector output with a microcontroller?

Connect the output pin to your microcontroller's digital input pin through a pull-up resistor (typically 1kΩ to 10kΩ) to the microcontroller's logic voltage (e.g., 3.3V or 5V). The sensor will pull this line to ground (sink current) when activated, creating a low logic signal.

What is the operating point (110 G to 180 G) specification?

This range defines the magnetic flux density required to reliably activate the sensor's output. The SS443A will switch its output ON when a South pole magnetic field strength between 110 Gauss and 180 Gauss is applied. Fields below 110 G may not trigger the sensor.

Package Includes

  • 1 x Honeywell SS443A Unipolar Hall Effect Sensor

Additional Information

Weight 0.11 kg
Dimensions 6 × 8 × 3 cm