R3 Miniature SMD Reed Sensor
These miniature SMD reed sensors are designed for low power, high speed switching applications, and have a cost advantage over the standard size SMD reed sensor. As they are molded with pre-flattened leads, no shock is transferred into the device when SMD formation takes place. Various activating distances are available depending on the magnet and the AT band used. The sensors are tested 100% for Operate AT, Release AT, Static Contact Resistance and Variable Contact Resistance before packing. Our products are completely Lead-free and conforms to the RoHS directive. Being an omnipolar device, this sensor can be actuated with either a north pole or a south pole or both. Choosing the right AT band, magnet strength, and operating axis, will restrict the number of operates and releases to one.
R3S Miniature Reed Sensor drawing 
R3S Reed Sensor PCB Layout drawing 
R3F Miniature Reed Sensor drawing 
R3F Reed Sensor PCB Layout drawing 
R3 Miniature Reed Sensor Carrier Tape drawing
Features
Normally Open contact. Three sensitivity bands. Two Lead Formations. Packed in Tapes for automatic assembly.
Cylindrical and Rectangular Magnets
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Drawing of Cylindrical MagnetsDrawing of Rectangular Bar Magnets starFeaturesNdFeB High Energy. Nickel coated. Energized
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Nov 18, 2020 |
Actuation Distances for R3 Miniature Reed Sensors
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Operate and release distances for the R3 ultra-miniature reed sensor in the three lead formations and two standard AT bands when actuated
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Oct 29, 2020 |
Electrical
| Contact Form | A | |
| Contact Rating (max) | W/VA | 10.0 |
| Switching Current (max) | A | 0.5 |
| Carry Current (max) | A | 0.75 |
| DC Switching Voltage (max) | VDC | 100 |
| Breakdown Voltage (min) | VDC | 150 |
| Contact Resistance (max) | mΩ | 150 |
| Insulation Resistance (min) | Ω | 109 |
| Capacitance (typ) | pF | 0.2 |
Miscellaneous
| Operate Time (max) | ms | 0.35 |
| Bounce Time (max) | ms | 0.30 |
| Release Time (max) | ms | 0.15 |
| Resonance Frequency (typ) | Hz | >2000 |
| Operating Frequency (max) | Hz | 500 |
| Operating Temperature Range | °C | -40 to +140 |
| Shock Resistance (½Sin wave for 11ms) | G | 30 |
| Vibration Resistance (10-2000 Hz) | G | 20 |
Ordering Code
R3-(Formation Code)-(Operate Band Code)
| Formation Code | Lead Type |
| S | Gull-wing SMD |
| F | Low Profile SMD |
| Operate Band Code | ||
| 1 | AT | 10-15 |
| 2 | AT | 15-20 |
| 3 | AT | 20-25 |
Examples: R3-S-1 denotes Gull-wing SMD version in 10-15 Operate Band (AT). R3-F-3 denotes Low Profile SMD Lead version in 20-25 Operate Band (AT).
Other Special Configurations: Lower Static Contact Resistance, Dynamic Contact Resistance Limit, Higher Insulation Resistance, Special Release Limits, Gold plated leads.
Usage Notes
Here are some of the recommended usage notes to ensure maximum durability of this product. The complete usage notes are available here.
Ampere Turn Selection
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For any application, it is important to select the correct Ampere Turn (AT) or magnetic sensitivity of a Reed Switch, Reed Sensor or
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Aug 27, 2020 |
Product Handling
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Reed Switch Handling Reed Switches, Reed Sensor and Magnet Sensors are sensitive devices that easily develop micro cracks in the glass
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Aug 31, 2020 |
Reflow Soldering
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Reflow Soldering is a process of automatically soldering multiple devices on a PCB. This is usually done after components are
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Aug 28, 2020 |
Manual Soldering
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Soldering of Reed Switches and Reed Sensors requires some care to ensure that these delicate devices are not inadvertently damaged. Damage
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Nov 10, 2020 |
Ferro-magnetic parts
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Reed Switches use an alloy of Nickel and Iron with a few other elements that make the alloy Ferro-magnetic and having a low Remanence.
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Sep 4, 2019 |
Reed Contact Protection Circuits
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It is assumed that the ideal reed switch load is a Resistive Load, but it is almost impossible to reduce any load to purely resistive.
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Aug 31, 2020 |
Applications
Although we can never restrict the use of a reed sensor to a particular field, the following is a list of some of the applications that the R3 Reed Sensor is known to perform well.
Reed sensors in Automobile Sun Visors
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Automobile Sun Visor Automobiles are fitted with visors that can be swiveled downwards and outwards to block the sun from the driver or
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Nov 7, 2020 |
Reed Sensors in Electric Car Chargers
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Electric Car Charging Station Electrical cars are designed to have a range of 250-300 kilometers on a full charge. To ensure that the
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Nov 7, 2020 |
Reed Sensors for Early Brake Sensing
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Automobile Brake Pedal The Brake pedal of an automobile is a very important aspect of the vehicle which is used to give an indication
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Nov 7, 2020 |
Reed switches in Lightsabers
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Light Saber Light Sabers are weapons used by the Jedi and the Sith, in the fictional Star Wars Universe, set in a galaxy far, far,
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Nov 7, 2020 |
Reed sensors to control Automobile Sun-roofs
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Automobile Sun Roof An automotive sun-roof, usually made of tinted glass, is a movable panel that can be opened or closed, fully or
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Nov 7, 2020 |
Reed sensors in Radio-controlled Gliders and model Airplanes
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Model Airplane Radio controlled aircrafts, gliders and helicopters come in various sizes from simple ones with few controls to more
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Nov 7, 2020 |
Magnet Sensors in Treadmills
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Treadmill Magnet Sensors find a few applications in treadmills for speed and gradient sensing. The speed of the belt is determined by
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Nov 7, 2020 |
Reed sensors for Tamper-proofing Electricity Meters
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Electric Companies use meters calibrated to measure 1 kilo-watt-hour and also measure maximum demand, which is the peak kilo-watt
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Nov 6, 2020 |
Reed sensors in Accurate level sensing of fluids
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Fuel Gauge In ships and yachts, it is not only necessary to monitor the exact volume of fuel, but also the volume of the sewage and the
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Nov 7, 2020 |
Accidental airbag deployment prevention
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Airbag deployment The airbag module is designed to inflate extremely rapidly then quickly deflate during a collision or a rapid sudden
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Nov 7, 2020 |
Magnet sensors for Automobile Cruise Control
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Cruise Control Cruise Control automatically controls the speed of a motor vehicle by adjusting the accelerator so that the driver need
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Nov 7, 2020 |
Reed sensors in Accurate fuel level sensing
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Fuel Level Automobile fuel gauges are used to display the volume of fuel in the tank. These gauges require a potentiomteric feedback
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Nov 7, 2020 |
Reed switches as Impact sensors for triggering airbags
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Airbags Statistics say almost 80% of automobiles use reed switch based crash sensors for triggering airbags. A ring magnet is mounted
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Nov 7, 2020 |
Magnet sensors for Dish Washer spray arm jam detection
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Dishwasher Dish Washers are appliances used to automatically wash dishes and cutlery, by spraying high pressure hot water and
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Nov 6, 2020 |
Level Sensing in Washing Machines and Dish Washers
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Washing Machine Water Level Washing machines and Dish Washers have smaller reservoirs to hold various fluids that help the user in
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Nov 6, 2020 |
Reed switches in Domestic Coffee Machines
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Domestic Coffee Machine Coffee Machines brew coffee when the user adds water, coffee powder and milk. Intelligent coffee machines such
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Nov 6, 2020 |
Reed sensors in Notebook computers and PC desktops
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Notebook Computer Notebook computers and Netbooks are part of personal life. Screen time on these devices is anywhere between 2 and 6
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Nov 6, 2020 |
Miniature Reed sensors in activating Dentist’s Drill
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Denstist's Drill A dental drill or hand-piece is a hand-held, mechanical instrument used to perform a variety of common dental
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Nov 6, 2020 |