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Honeywell SS345PT Unipolar Hall Effect Magnetic Sensor - SOT-23-3 SMD, 55-280 G Operating Point, 2.7-7V

₹43.00 (Inclusive of all taxes)
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The Honeywell SS345PT is a unipolar digital Hall-effect sensor IC in a compact SOT-23-3 SMD package, designed for precise magnetic field detection with an operating point range of 55 to 280 Gauss. It operates from a 2.7 to 7 VDC supply, making it suitable for low-voltage, energy-efficient designs in industrial, automotive, and consumer electronics.

Features

  • Unipolar digital Hall-effect sensor with a 55 G to 280 G operating point range.
  • Wide operating voltage range from 2.7 VDC to 7 VDC for low-power applications.
  • Extended operating temperature range from -40°C to 150°C for harsh environments.
  • Compact SOT-23-3 surface-mount (SMD) package for automated PCB assembly.
  • Open-collector output with a maximum sink current of 4 mA for direct digital interfacing.

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Description

The Honeywell SS345PT is a solid-state digital Hall-effect sensor IC that provides a reliable digital output signal in response to a unipolar magnetic field from a south pole. Its operation is based on the Hall effect principle, where a voltage difference is generated across a conductor when a magnetic field is applied perpendicular to the current flow. This IC integrates the Hall plate, signal conditioning, and an open-collector output switch into a single monolithic chip.

Engineered for stability across a broad industrial temperature range from -40°C to 150°C, the SS345PT is ideal for applications requiring consistent performance in challenging thermal environments. The 2.7 VDC minimum operating voltage enables integration into modern low-voltage microcontroller systems, promoting overall system energy efficiency without sacrificing magnetic sensitivity or switching accuracy.

Key Features

  • Unipolar Magnetic Activation: Responds specifically to a south magnetic pole, providing precise digital switching for position and motion sensing.
  • Low-Voltage Operation: Supports a supply range from 2.7 VDC to 7 VDC, ideal for battery-powered and energy-conscious designs.
  • Extended Temperature Resilience: Guaranteed operation from -40°C to 150°C for use in automotive, industrial, and high-temperature applications.
  • Compact SMD Footprint: Housed in a space-saving SOT-23-3 package compatible with high-volume, automated PCB assembly processes.
  • Open-Collector Digital Output: Provides a 4 mA sink current capability for direct interfacing with microcontrollers, logic gates, or indicator LEDs.
  • Robust Signal Conditioning: On-chip circuitry provides temperature-compensated operation for stable switching points over the entire operating range.

Applications

  • Brushless DC (BLDC) Motor Commutation: Detects rotor magnet position for precise electronic speed control in fans, pumps, and drives.
  • Lid/Door Closure Detection: Provides non-contact end-of-travel sensing in appliances, automotive compartments, and safety interlocks.
  • Linear & Rotary Position Sensing: Monitors the position of moving parts in industrial actuators, valve controls, and throttle bodies.
  • Proximity & Presence Detection: Used in vending machines, security systems, and automated equipment for object detection.
  • Speed & Revolution Counting: Measures rotational speed in gear tooth sensing, flow meters, and tachometer applications.

Technical Specifications

Manufacturer Part Number (MPN)SS345PT
Sensor TypeUnipolar Digital Hall-Effect
Operating Point (Bop)55 G to 280 G
Supply Voltage Range2.7 VDC to 7 VDC
Operating Supply Current14 mA (max)
Output TypeOpen Collector
Max Output Current (Sink)4 mA
Operating Temperature-40°C to 150°C
Package / CaseSOT-23-3
Mounting TypeSMD / SMT

Frequently Asked Questions

What is the magnetic operating point range for the SS345PT sensor?

The Honeywell SS345PT is a unipolar sensor with an operating point (Bop) range of 55 to 280 Gauss. This means the integrated open-collector output switch will activate (pull low) when a south magnetic pole of sufficient strength within this range is applied to the branded face of the package.

What is the minimum operating voltage for this Hall sensor?

The SS345PT is designed for low-voltage applications and can operate from a supply voltage as low as 2.7 VDC, with a maximum rating of 7 VDC. This makes it compatible with 3.3V and 5V microcontroller systems commonly found in modern embedded designs.

How do I interface the SS345PT output with a microcontroller?

The sensor features an open-collector digital output. Connect the output pin to your microcontroller's digital input pin through a pull-up resistor (typically 1kΩ to 10kΩ) to the logic supply voltage (e.g., 3.3V or 5V). The output will sink up to 4 mA to ground when activated, providing a clean low logic signal.

What is the operating temperature range of this sensor?

The SS345PT is rated for continuous operation across an extended industrial temperature range from -40°C to 150°C. This high-temperature capability makes it suitable for under-hood automotive applications, industrial motor controls, and other harsh environment sensing tasks.

Package Includes

  • 1 x Honeywell SS345PT Unipolar Hall Effect Magnetic Sensor

Additional Information

Weight 0.01 kg
Dimensions 15 × 7 × 2 cm