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

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.

  • Drawing of R3S Miniature Reed Sensor
  • Drawing of R3S PCB Layout
  • Drawing of R3F Miniature Reed Sensor
  • Drawing of R3F PCB Layout
  • Drawing of R3 Tape


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.

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 R3 Miniature Reed Sensors

R3S magnet actuation Operate and release distances for the R3S miniature SMD reed sensor in the three...Continue reading ->


Contact FormA
Contact Rating (max)W/VA10.0
Switching Current (max)A0.5
Carry Current (max)A0.75
DC Switching Voltage (max)VDC100
Breakdown Voltage (min)VDC150
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

R3-(Formation Code)-(Operate Band Code)

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

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

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 R3 Reed Sensor is known to perform well.

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 Sensors in Electric Car Chargers

E-car charger Electrical cars are designed to have a range of 250-300 kilometers on a full...Continue reading ->

Reed Sensors for Early Brake Sensing

Brake pedal When the brake pedal is pressed, the magnet is the first to move away...Continue reading ->

Reed switches in Lightsabers

Reed Switches are used in Lightsabers to for power up only when the owner...Continue reading ->

Reed sensors to control Automobile Sun-roofs

automotive sunroof An automotive sun-roof, usually made of tinted glass, is a movable panel that can...Continue reading ->

Reed sensors in Radio-controlled Gliders and model Airplanes

Reed switches in model airplanes Reed Sensors are very light devices and can be used in model airplanes, helicopters...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 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 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 ->

Accidental airbag deployment prevention

Reed switches in airbag deployment When a collision occurs, accidental deployment of the airbags is prevented, by sensing whether...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 sensors in Accurate fuel level sensing

Reed switches in fuel level sensing Special reed sensors with an integrated resistor can be mounted on PCBs to give...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 switches in Domestic Coffee Machines

Reed switches in Domestic coffee machine Domestic coffee machines use a solenoid to fill up the water reservoir whenever needed....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 ->

Miniature Reed sensors in activating Dentist’s Drill

Dentist Drill A reed sensor finds the perfect application in such a drill, to work as...Continue reading ->
R3 Miniature SMD Reed Sensor
R3 SMT reed sensors from RRE: 16.25 mm pitch gull wing, 10W, omnipolar, normally open (NO), complete data sheet and technical specifications.
Brand: RRE
Manufacturer: Reed Relays and Electronics
Model: R3
4.1 based on 6 reviews