Silicon Labs 1 Axis Surface Switch/Latch Hall Effect Magnetic Position Sensor 1.71 V to 5.5 V, SOT-23, 3-Pin SI7201-B-30-IV

Silicon Labs SI7201-B-30-IV is a 1 Axis Surface Switch/Latch Hall Effect Magnetic Position Sensor designed to provide reliable magnetic switch/latch capabilities. Featuring CMOS technology and housed in a compact SOT-23 3-pin package, this sensor supports a broad supply voltage range from 1.71 V to 5.5 V and operates efficiently across temperatures from -40°C to 125°C.

This sensor exhibits high magnetic sensitivity of 1.1mT and supports high-frequency responses up to 113000 Hz, making it ideal for rapid and precise position sensing. Its omnipolar latch magnetic type enables reliable detection of magnetic fields for various industrial and consumer applications.

Applications for the SI7201-B-30-IV include the replacement of reed switches in consumer electronics and security systems, position sensing for HVAC control knobs, door locks, and windows, as well as fluid level sensing and BLDC motor control. It is suitable for camera image stabilization, zoom, and autofocus mechanisms, and general mechanical position sensing tasks.

The sensor’s compact dimensions of 2.75 mm length, 1.6 mm width, and 1.15 mm height allow for easy integration onto PCBs in constrained spaces. Its fast response time of 8.8 microseconds supports high-performance electronic systems needing quick state changes. Compliance with standards such as ISO 7637-2-2-11 and Ford EMC-CS-2009.1 ensures reliability and compatibility in automotive and industrial environments.

Utilizes CMOS technology for superior performance. Offers a wide operating temperature range from -40°C to 125°C. High sensitivity of 1.1mT suitable for precise position sensing. Compact dimensions: 2.75mm length, 1.6mm width, and 1.15mm height.

Maximum frequency response up to 113000 Hz for fast detection. Minimum frequency response down to 5 Hz to capture slow changes. Pin count includes 3 pins configured in a SOT-23 package. Response time is rapid at 8.8 microseconds.

Meets standards including ISO 7637-2-2-11 and Ford EMC-CS-2009.1. Omnipolar latch magnetic type suitable for various switching applications.

This sensor IC is widely employed in industrial automation, HVAC systems, security devices, motor controllers, and camera modules. By replacing traditional reed switches, it enhances durability and reliability in mechanical position sensing.

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