SKU: SENS-0967
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Honeywell SM351LT Nanopower Omnipolar Hall Effect Sensor - SOT-23-3 Package

₹70.00 (Inclusive of all taxes)
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The Honeywell SM351LT is a nanopower, omnipolar Hall effect sensor in a compact SOT-23-3 package, designed for ultra-low-power applications. It operates from 1.65V to 5.5V, making it compatible with a wide range of microcontrollers and battery-powered systems, and provides a push-pull output for simplified circuit design.

Features

  • Ultra-low nanopower consumption with 360 nA average current
  • High sensitivity with 7 Gauss typical, 11 Gauss maximum operating range
  • Wide supply voltage range from 1.65 VDC to 5.5 VDC
  • Omnipolar sensing activates with either North or South magnetic pole
  • Push-pull output eliminates need for external pull-up resistor

Out of stock

Description

The SM351LT is a non-chopper stabilized Hall effect sensor engineered for exceptional power efficiency and reliable magnetic field detection. Its nanopower architecture draws an average current of just 360 nA, making it ideal for battery-critical and energy-harvesting applications where long-term operation is paramount.

Featuring omnipolar operation, the sensor activates in the presence of a sufficiently strong magnetic field of either polarity, simplifying magnet placement and system design. The integrated push-pull output stage provides a clean digital signal, directly compatible with microcontroller GPIO pins without additional components. The device is specified for operation across the industrial temperature range of -40°C to 85°C and is housed in a RoHS-compliant SOT-23-3 surface-mount package.

Key Features

  • Nanopower Operation: Consumes a mere 360 nA average current, enabling multi-year operation on coin-cell batteries.
  • High Magnetic Sensitivity: Typical operate point of 7 Gauss (max 11 Gauss) for reliable detection with small or distant magnets.
  • Broad Voltage Compatibility: Operates from 1.65V to 5.5V, supporting 1.8V, 3.3V, and 5V logic systems seamlessly.
  • Omnipolar Magnetic Detection: Responds to both North and South magnetic poles, simplifying assembly and magnet orientation.
  • Integrated Push-Pull Output: Provides a robust digital output signal, removing the need for an external pull-up resistor.
  • Industrial Temperature Range: Rated for reliable performance from -40°C to 85°C for use in harsh environments.
  • Compact SMT Footprint: Housed in a space-saving, industry-standard SOT-23-3 surface-mount package.
  • Non-Chopper Stabilized Design: Offers consistent magnetic switching points without the noise associated with chopper-stabilized sensors.

Applications

  • Battery-Powered Position Sensing: Lid/door open detection in IoT devices, wearables, and smart home sensors.
  • Ultra-Low-Power Consumer Electronics: Non-contact switching in remote controls, earbud cases, and portable gadgets.
  • Medical Device Status Monitoring: Tamper detection, drawer position sensing, or component presence verification in portable medical equipment.
  • Industrial Limit & Proximity Switching: Low-speed rotary encoding, valve position feedback, or safety interlock systems.

Technical Specifications

Manufacturer Part NumberSM351LT
Sensor TypeOmnipolar Hall Effect Switch
Package / CaseSOT-23-3
Mounting TypeSMD/SMT
Supply Voltage Range1.65 VDC to 5.5 VDC
Operating Point (Typical)7 Gauss
Operating Point (Maximum)11 Gauss
Average Supply Current360 nA
Output TypePush-Pull
Max Output Current5 mA
Operating Temperature Range-40°C to 85°C
ComplianceRoHS

Frequently Asked Questions

What is the power consumption of the SM351LT sensor?

The SM351LT is a nanopower device with an average supply current of only 360 nanoamperes (nA). This ultra-low current draw makes it suitable for applications powered by small batteries or energy harvesters, enabling years of continuous operation on a single charge.

Does this Hall sensor require an external pull-up resistor?

No, an external pull-up resistor is not required. The SM351LT features a push-pull output stage that actively drives the output line high or low. This simplifies your circuit design and directly interfaces with microcontroller GPIO pins.

What magnetic polarity does the SM351LT detect?

The SM351LT is an omnipolar sensor, meaning it activates when exposed to a sufficiently strong magnetic field from either the North or South pole. This simplifies system design as magnet orientation is not critical, and only the field strength needs to exceed the 7 Gauss (typical) operate point.

What is the operating voltage range for this sensor?

The sensor has a wide supply voltage range from 1.65 VDC to 5.5 VDC. This allows it to be used directly with 1.8V, 3.3V, and 5V logic systems without the need for a level shifter, providing significant design flexibility.

Package Includes

  • 1 x Honeywell SM351LT Hall Effect Sensor

Additional Information

Weight 0.11 kg
Dimensions 6 × 8 × 3 cm