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

  • Does not require power for operation
  • Normally Open Form A contact
  • Sputtered Ruthenium contact
  • Omni-polar device; actuates with either pole of magnet
  • Two types of lead configurations
  • Three magnetic sensitivity bands
  • Molded with internal blades parallel to SMD feet
  • Packed in tape and reels conforming to IEC-60286-3 norms
  • RoHS Compliant and Lead-free
  • Not Sensitive to ESD

R3-S miniature SMD reed sensor drawing
All dimensions in mm
View actuation distances for this 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 conform to the RoHS directive. Click to download this product data sheet as a PDF.


This reed sensor is suitable for use in the following applications and in many others: cellular phones and PDAs, weather proof electronics, electric tooth brushes, automobiles with electronic keys, digital pressure gauges, wind vanes, survival rafts and ELTs, pedometers, model gliders


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) 150
Operating Temperature °C -40 to +140
Shock Resistance (½Sin wave for 11ms) G 30
Vibration Resistance (10-2000Hz) G 20

Ordering Code

R3-(Lead Formation Code)-(Operate AT Code)

Formation Code Lead Formation OAT Code *Before *After
S SMD 1 10-15 18-31
F Low-profile SMD 2 15-20 28-41
3 20-25 38-51

* Indicate Operate AT band before and after modification of leads


Denotes 20-25 Operate AT, Low profile SMD formed.

Other Special Configurations Available

Non standard lead formations
Dynamic Contact Resistance Limit
Special Release AT Limits
Gold plated leads

Possible magnet actuations

Standard Size Reed Sensor Magnet Actuation Examples

A few examples of magnet actuation are shown above. 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. Click here to view actuation distances of this sensor with the standard magnets.

Recommended Reflow Profile

SMD Soldering Procedure

Tape and Reel Dimensions

The R3-S and the R3-F can be tape and reel packed for automatic pick and place, as per IEC-60286-3 norms. 2500 will be packed per spool. 40 – 80g force will be required to peel off cover tape.

R3 Miniature Reed Sensor Tape and Reel Drawing

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
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