R2B, Normally Closed, SMD Reed Sensor
Drawing of R2B-S NC Reed Sensor 
R2B-S Gull-wing SMD Formed Reed Sensor Pad Layout 
Drawing of R2B-F NC Reed Sensor 
R2B-F Low Profile SMD Formed Reed Sensor Pad Layout 
Drawing of R2B Carrier Tape
Features
10W Contact Rating. Normally Closed contact. Polarity Sensitive. Two sensitivity bands. Two Lead formations.
Description
These Normally Closed SMD reed sensors are built with an inbuilt biasing magnet. 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 release and operate AT, Static Contact Resistance and Variable Contact Resistance before packing. Opposing poles of magnet and sensor cause this normally closed sensor contact to release. Like poles do not cause a release. Choosing the right AT band, magnet strength, and operating axis, will restrict the number of operates and releases to one. All dimensions are in mm.
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 R2B NC Reed Sensors
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Operate and release distances for the R2B Normally closed reed sensor in the two standard AT bands when actuated with NdFeB standard
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Oct 30, 2020 |
Electrical
| Contact Form | B | |
| Contact Rating (max) | W/VA | 10.0 |
| Switching Current (max) | A | 0.5 |
| Carry Current (max) | A | 1.50 |
| DC Switching Voltage (max) | VDC | 180 |
| Breakdown Voltage (min) | VDC | 200 |
| 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 | 0.15 |
| 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
R2B-(Formation Code)-(Release Band Code)
| Formation Code | Lead Type |
| S | Gull-wing SMD |
| F | Low Profile SMD |
| Release Band Code | ||
| 1 | AT | 10-15 |
| 2 | AT | 15-20 |
Examples: R2B-S-2 denotes R2B Reed Sensor with Gull-wing SMD formed leads, in 15-20 Release Band (AT). R2B-F-1 denotes R2B Reed Sensor with Low profile SMD formed leads, in 10-15 Release 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 R2B Normally Closed Reed Sensor is known to perform well.
Reed Sensors in In-road Warning Lights
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In-road warning lights Road traffic control devices or In-road Warning Lights, are markers, signs and signal devices used to inform,
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Dec 1, 2020 |
Reed switches in Safety Vane applications
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Conveyor Vane The automation industry depends on feeding systems which feed parts of different shapes into the assembly machine. The
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Nov 7, 2020 |
Reed sensors in Emergency lamp holders
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Emergency Lamps Emergency lamps are rechargeable battery powered lamp that automatically turn on when there is a mains power outage.
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Nov 7, 2020 |
Reed sensors in Survival rafts and ELTs
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Emergency Raft Survival rafts contain water sensors which trigger the compressed air cylinder to inflate the raft when dropped into the
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Nov 7, 2020 |
Reed sensors used in Fuel cap position sensing
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Automobile fuel cap open A dashboard or an instrument panel located in front of the automobile driver and displays instrumentation and
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Nov 7, 2020 |
Reed sensors in Telephone Handsets
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Telephone Handset Even though the telephone was ubiquitous in the 80s and 90s even every home or office, it has been replaced with
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Nov 20, 2020 |