SKU: SENS-0986
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Honeywell SS441A Unipolar Hall Effect Magnetic Sensor - TO-92 Package

₹87.00 (Inclusive of all taxes)
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The Honeywell SS441A is a unipolar Hall-effect magnetic sensor in a TO-92 package, designed for through-hole PCB mounting. It operates from a 4.5 to 10.5 VDC supply and features a precise 55 to 115 Gauss operating point, making it ideal for position sensing and proximity detection in automotive, industrial, and consumer electronic systems.

Features

  • Unipolar magnetic sensing with an operating point range of 55 G to 115 G.
  • Wide operating voltage range of 4.5 VDC to 10.5 VDC for flexible system integration.
  • Robust TO-92 package rated for an extended temperature range of -40°C to +150°C.
  • Low power consumption with a typical operating current of 10 mA.
  • Output voltage up to 12 V with a maximum output current of 20 mA.

Out of stock

Description

The Honeywell SS441A is a solid-state Hall-effect sensor engineered for reliable unipolar magnetic field detection. Its operation is based on the Hall effect principle, where a voltage proportional to the applied magnetic field is generated, providing a digital output signal upon reaching the preset threshold. This design ensures stable and repeatable switching for precise position and proximity sensing.

Housed in a durable TO-92 package, the sensor is built to withstand harsh environmental conditions, including a wide operating temperature range from -40°C to +150°C. Its through-hole mounting design facilitates easy and secure integration onto printed circuit boards (PCBs), making it suitable for automated assembly processes and space-constrained applications.

Key Features

  • Precision Unipolar Sensing: Accurately detects a single magnetic pole with a defined 55 to 115 Gauss activation range for consistent performance.
  • Broad Voltage Compatibility: Supports a 4.5 to 10.5 VDC supply range, compatible with common 5V and higher voltage logic systems.
  • Industrial-Grade Durability: TO-92 package ensures reliable operation across an extreme temperature span from -40°C to +150°C.
  • Optimized Power Profile: Features low 10 mA operating current, contributing to energy-efficient system designs.
  • High Output Drive Capability: Can source up to 20 mA, allowing direct interfacing with relays, LEDs, or microcontroller inputs.
  • Simplified PCB Integration: Standard through-hole TO-92 footprint enables straightforward mounting and soldering.

Applications

  • Brushless DC (BLDC) motor commutation and speed detection.
  • Proximity switching for lid closure detection in appliances and security systems.
  • Linear and rotary position sensing in automotive throttle pedals and gear selectors.
  • Displacement and end-of-travel limit switches in industrial automation.
  • Magnetic tamper detection in meters and access control devices.

Technical Specifications

Manufacturer Part NumberSS441A
Sensor TypeUnipolar Hall Effect
Operating Point55 G to 115 G
Supply Voltage4.5 VDC to 10.5 VDC
Operating Current10 mA
Maximum Output Current20 mA
Output Voltage12 V
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 SS441A, activates (switches on) only when a specific magnetic south or north pole is presented and deactivates when the field is removed or falls below the release point. A bipolar sensor requires both polarities to operate, typically switching on with one pole and off with the opposite pole.

What is the recommended circuit configuration for the SS441A sensor?

Connect the SS441A's VCC pin to a 4.5-10.5 VDC supply and GND to ground. The output pin provides an open-collector signal. A pull-up resistor (typically 1kΩ to 10kΩ) to VCC is required on the output pin to read a logic-high voltage when the sensor is off. The output sinks current (goes low) when the magnetic field exceeds the operating point.

How do I determine the sensor's state relative to the magnetic field strength?

The sensor output is OFF (high impedance, pull-up resistor pulls line high) when the applied magnetic flux density is below the minimum operating point (55 G). The output switches ON (sinks current, line goes low) when flux density reaches between 55 G and 115 G. It remains ON until the field drops below the release point, which is lower than the operating point due to built-in hysteresis.

Can the SS441A be used with an Arduino or Raspberry Pi?

Yes. When using a 5V Arduino, power the sensor from the 5V pin. The sensor's open-collector output should be connected to a digital input pin via a pull-up resistor (external or using the microcontroller's internal pull-up). For a 3.3V Raspberry Pi, ensure the sensor's supply voltage does not exceed 3.3V or use a level shifter on the output, as the sensor's VCC range starts at 4.5V.

Package Includes

  • 1 x Honeywell SS441A Unipolar Hall Effect Magnetic Sensor

Additional Information

Weight 0.11 kg
Dimensions 6 × 8 × 3 cm