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

MS-108 Standard Size PCB Mountable Reed Sensor

MS-105 actuation distance Standard Size, PCB Mountable Reed Sensor Drawing
MS-105 actuation distance
MS-105 actuation distance


Does not require power for operation  Normally Open Form A contact  Sputtered Ruthenium contact  Omni-polar device; actuates with either pole of magnet  20.3 mm pin pitch  Three magnetic sensitivity bands  RoHS Compliant and Lead-free  Not Sensitive to ESD


This standard size PCB mountable reed sensor is manufactured to carry up to 1.5A. The internal blades always parallel to the top surface of the sensor. Change-over versions can also be built on request. All 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.


This reed sensor is suitable for use in the following applications and in many others: microphones and radio transmitters, copier and scanner doors, coffee machines, rowing electronics, power switches in explosive areas


Contact Form A
Contact Rating (max) W/VA 10.0
Switching Current (max) A 0.5
Carry Current (max) A 1.5
DC Switching Voltage (max) VDC 180
Breakdown Voltage (min) VDC 200
Contact Resistance (max) 150
Operating Temperature °C -40 to +100
Shock Resistance (½Sin wave for 11ms) G 50
Vibration Resistance (10-2000Hz) G 20

Ordering Codes

MS-108-(Operate AT Code)

OAT Code AT Band
1 10-15
2 15-20
3 20-25

Operate AT bands indicated above are for unmodified reed switch.
Example: MS-108-1
Denotes MS-108 Reed Sensor in 10-15 Operate AT

Other Special Configurations Available

Dynamic Contact Resistance Limit
Special Release AT Limits
Gold plated leads

Possible magnet actuations

PCB Mountable Reed Sensor 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.

MS-108 Standard Size PCB Mountable Reed Sensor
Standard Size PCB Mountable Reed Sensor Series: 10W, omnipolar, complete data sheet and technical specifications.
Brand: RRE
Manufacturer: Reed Relays and Electronics
Model: MS-108
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