Reed Relays and
Electronics India Limited
Manufacturer of Reed Switches, Reed Sensors and Reed-based products
Reed Relays and Electronics India Limited Incorporated in 1971

R2 Standard size SMD Reed Sensor

  • Drawing of R2-S Reed Sensor
  • Drawing of R2-S Reed Sensor Pad Layout
  • Drawing of R2-F Reed Sensor
  • Drawing of R2-F Reed Sensor Pad Layout
  • Drawing of R2 Reed Sensor Carrier Tape


10W Contact Rating. Normally Open contact. Three sensitivity bands. Two Lead Formations. Packed in Tapes for automatic assembly.



Omni-polar. Does not require power for operation. Sputtered Ruthenium Contact. RoHS Compliant. Not ESD Sensitive. Packed in Tape and Reel.


These R2 standard size SMD reed sensors are designed for carrying moderate current and have an SMD pitch which is slightly wider than the miniature 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 and release AT, Contact Resistance and Variable Contact Resistance before packing. 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. All dimensions are in mm.

Cylindrical and Rectangular Magnets

Standard magnets-RRE We offer a range of magnets in different sizes and shapes, specially selected to...Continue reading ->

Actuation Distances for R2 Reed Sensors

R2S magnet actuation Operate and release distances for the R2S SMD reed sensor in the three standard...Continue reading ->


Contact FormA
Contact Rating (max)W/VA10.0
Switching Current (max)A0.5
Carry Current (max)A1.50
DC Switching Voltage (max)VDC180
Breakdown Voltage (min)VDC200
Contact Resistance (max)150
Insulation Resistance (min)Ω109
Capacitance (typ)pF0.2


Operate Time (max)ms0.35
Bounce Time (max)ms0.30
Release Time (max)ms0.15
Resonance Frequency (typ)Hz>2000
Operating Frequency (max)Hz500
Operating Temperature Range°C-40 to +140
Shock Resistance (½Sin wave for 11ms)G30
Vibration Resistance (10-2000 Hz)G20

Ordering Code

R2-(Formation Code)-(Operate Band Code)

Formation CodeLead Type
SGull-wing SMD
FLow Profile SMD
Operate Band Code

Examples: R2-S-3 denotes R2 Reed Sensor with Gull wing SMD formed leads, in 20-25 Operate Band (AT). R2-1-F denotes R2 Reed Sensor with Low profile SMD formed Leads, in 10-15 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

Reed Sensor Manufacturer Cross Reference For any application, it is important to select the correct Ampere Turn (AT) or...Continue reading ->

Product Handling

Dropping Reed switch Reed Switches, Reed Sensor and Magnet Sensors are sensitive devices that easily develop micro...Continue reading ->

Reflow Soldering

Drawing of SMD reflow soldering curve Reflow Soldering is the process of automatically soldering multiple devices to a PCB. Continue...Continue reading ->

Manual Soldering

Soldered Reed switch Manual Soldering of reed switch leads may be required when using custom plastic housing...Continue reading ->

Ferro-magnetic parts

Ferromagnetic parts Using Ferro-magnetic mounting parts or screws within a 100 mm vicinity of a reed switch will...Continue reading ->

Reed Contact Protection Circuits

Inductive Load Protection Circuit When a reed switch is to be connected to an inductive load or a...Continue reading ->


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 R2 Reed Sensor is known to perform well.

Float Switches in Portable Air Conditioners

portable ac Portable ACs cool an area by removing the humidity in the room and storing...Continue reading ->

Reed Sensors in Hotel Security Card Readers

hotel card reader In most hotels, the simplest method for a guest to enter a room is...Continue reading ->

Reed sensors in Automobile Sun Visors

Automobile Sun Visor A reed sensor and a magnet is used in the sliding mirror assembly to...Continue reading ->

Reed switches and Reed Sensors in Barcode Scanners

Barcode Scanner A reed switch and magnet combination is used in the docks and barcode scanners...Continue reading ->

Reed Switches in Exhaust Emissions Sensing

Automotive exhaust fume emission A simple vane with a magnet fitted inside the tailpipe of automobiles is used...Continue reading ->

Reed switches in Safety Vane applications

conveyor belt Optic sensor lenses need to be exceptionally clean for vane sensing applications. A reed...Continue reading ->

Magnet Sensors in Treadmills

Reed switches in treadmill The speed of the belt is determined by positioning a reed sensor near the...Continue reading ->

Reed Switches and Reed Sensors in Digital Fishing Reels

Reed switch usage in electric fishing reel Electric fishing reels are equipped with reed sensors which generate pulse on rotation of...Continue reading ->

Reed sensors for Tamper-proofing Electricity Meters

tamper proof electricity meter To tamper proof Electricity meters, Reed Sensors are placed near the front cover of...Continue reading ->

Reed switches and Reed sensors in Pressure Gauges

Reed switches in bourdon tube pressure gauge Bourdon tube pressure gauges are fitted with a magnet on the Bourdon tube itself...Continue reading ->

Reed sensors in Accurate level sensing of fluids

Reed switches in fluid level sensing Special reed sensors with an integrated resistor can be mounted on PCBs to give...Continue reading ->

Reed sensors in Central Locking of Cars with Remote Keys

Reed switches in door sensors In newer cars with electronic keys, the key code is compared with onboard computer...Continue reading ->

Magnet sensors for Automobile Cruise Control

Reed switches in speedometers A multi pole ring magnet can be attached to the speedometer actuating shaft, and...Continue reading ->

Reed switches as Impact sensors for triggering airbags

Accidental Airbag Prevention Statistics say almost 80% of automobiles use reed switch based crash sensors for triggering...Continue reading ->

Magnet sensors for Dish Washer spray arm jam detection

Reed switches in dish washer spray arm jam detection Reed Sensors are used in dish washers for spray arm jam detection and door...Continue reading ->

Level Sensing in Washing Machines and Dish Washers

Washing Machines Washing machines and dish washers have reservoirs to hold detergent, and fabric or water...Continue reading ->

Reed sensors and Magnet sensors in Commercial Coffee Machines

Reed switches in commercial coffee machine Commercial coffee, tea, and milk vending machines need to dispense enough milk or water...Continue reading ->

Reed sensors in Notebook computers and PC desktops

Notebook computer In notebook computers the screen is closed to put the system into sleep mode....Continue reading ->

Magnet sensors for Tension Monitoring in Coil Winders

Magnet sensors in Winding count and tension sensing and in Coil Winders Reed Sensors find an important role in closed loop tension control and coil winding...Continue reading ->
R2 Standard size SMD Reed Sensors
R2 SMT Reed Sensors from RRE: 19.5 mm pitch gull wing, 10W, omnipolar, normally open (NO), complete data sheet and technical specifications.
Brand: RRE
Manufacturer: Reed Relays and Electronics
Model: R2
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