Honeywell has expanded its Hall-effect sensor portfolio with the new SS351AT Series and SS451A Series Omnipolar Hall-effect Digital Position sensors that are designed to respond to either a North pole or a South pole. These products join the recently introduced SS311PT, SS411P, SS30AT, SS361RT, SS461R, SS340RT, and SS440R Series digital Hall-effect sensors that utilize a downsized integrated circuit, resulting in lower costs for customers.
The SS351AT and SS451A are small, versatile digital Hall-effect devices that are operated by the magnetic field from a permanent magnet or an electromagnet. They are designed for high-volume, cost-sensitive motion control, lid closure detection, and displacement sensing applications.
SS440R Series: Leaded flat TO-92 style package (bulk packaging, 1000 units per bag). Future options will include ammopack (fan-fold) type tape, with straight or formed leads for automated assembly; responds to South pole.
Two package styles:
• SS351AT: Subminiature SOT-23 surface mount package; supplied on tape and reel (3000
units per reel)
• SS451A: Small leaded, flat TO-92-style package; available in bulk package (1000 units per
bag)
The new SS351AT and SS451A provide value for our customers by:
Price competitive: Honeywell has downsized the integrated circuit, saving on
manufacturing costs while still meeting customer requirements; these savings result in lower costs to
customers
Helps reduce total system cost: Because they can be operated by a North pole or a South
pole, they do not require the magnet polarity to be identified, thus making the installation easier and
potentially reducing system cost
Reduces manufacturing costs: SS351AT is supplied on tape and reel, often allowing for
automated, lower-cost pick and place assembly which can help the customer reduce manufacturing costs
Subminiature size: SS351AT’s subminiature package size requires less printed circuit
board (PCB) space, allowing for use in smaller assemblies
Promotes energy efficiency: Low 3 Vdc supply voltage capability allows for use in low voltage applications,
promoting energy efficiency
Versatile: Omnipolar capability allows for use in a variety of potential applications,
including motion control, lid closure detection, and displacement sensing
Prevents damage during installation: Built-in reverse polarity protects the device from potential damage
during installation
Prevents damage during installation: Built-in reverse polarity protects the device from potential damage
during installation
Commercial
• Speed and RPM sensing in fitness equipment
• Magnetic encoder for building access
• Damper or valve position control in HVAC equipment
• Flow rate sensing in appliances and water softeners
• Printer head position sensing
Industrial
• Flow rate sensing in industrial processes
• Robotic control (cylinder position monitoring)
• Float-based fluid level sensing
Medical
• Displacement sensor in hospital beds and medical equipment
• Medication bin monitor on portable drug carts
