R2E Latching / Bi-stable SMD Reed Sensors
Drawing of R2E-S Latching SMD Reed Sensor 
R2E-S Gull-wing SMD Formed Reed Sensor Pad Layout 
Drawing of R2E-F Latching SMD Reed Sensor Drawing 
R2E-F Low Profile SMD Formed Reed Sensor Pad Layout 
Drawing of R2E Reed Sensor Carrier Tape
Features
10W Contact Rating. Bi-stable, Lacthing contact. Polarity Sensitive. Packed in Tapes for automatic assembly. Two Lead Formations.
Description
These bi-stable 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 latching/unlatching distances are available depending on the magnet used. The sensors are tested 100% for Operate AT, Release 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
 | Drawing of Cylindrical MagnetsDrawing of Rectangular Bar Magnets starFeaturesNdFeB High Energy. Nickel coated. Energized Continue reading Nov 18, 2020 |
Actuation Distances for R2E Latching Reed Sensors
 | Operate and release distances for the R2E Latching type reed sensor in the two standard AT bands when actuated with NdFeB standard magnets Continue reading Oct 30, 2020 |
Electrical
| Contact Form | B | |
| Contact Rating (max) | W/VA | 10.0 |
| Switching Current (max) | A | 0.5 |
| Carry Current (max) | A | 1.0 |
| 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 | 0.15 |
| 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
R2E-(Formation Code)-(Operate AT Code)
| Formation Code | Lead Type |
| S | Gull-wing SMD |
| F | Low Profile SMD |
| Latch/Unlatch Band Code | ||
| 1 | AT | 10-15 |
| 2 | AT | 15-20 |
Examples: R2E-S-2 denotes R2E Reed Sensor with Gull-wing SMD formed leads, in 15-20 Latch/Unlatch Band (AT). R2E-F-1 denotes R2E Reed Sensor with Low profile SMD formed leads, in 10-15 Latch/Unlatch Band (AT).
Other Special Configurations: Lower Static Contact Resistance, 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
 | For any application, it is important to select the correct Ampere Turn (AT) or magnetic sensitivity of a Reed Switch, Reed Sensor or Continue reading Aug 27, 2020 |
Product Handling
 | Reed Switch Handling Reed Switches, Reed Sensor and Magnet Sensors are sensitive devices that easily develop micro cracks in the glass Continue reading Aug 31, 2020 |
Reflow Soldering
 | Reflow Soldering is a process of automatically soldering multiple devices on a PCB. This is usually done after components are Continue reading Aug 28, 2020 |
Manual Soldering
 | Soldering of Reed Switches and Reed Sensors requires some care to ensure that these delicate devices are not inadvertently damaged. Damage Continue reading Nov 10, 2020 |
Ferro-magnetic parts
 | 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. Continue reading Sep 4, 2019 |
Reed Contact Protection Circuits
 | 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. Continue reading 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 R2E Normally Closed Reed Sensor is known to perform well.
Reed switches in Floor detection in Elevators and Lifts
 | Elevator Most people are aware of Elevators, or lifts, as they are called in certain areas of the world. The electrical motors in Continue reading Nov 7, 2020 |
Reed sensors in Accurate level sensing of fluids
 | 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 Continue reading Nov 7, 2020 |