How does a Reed Switch work?

A Reed Switch consists of a pair of ferromagnetic reeds, overlapping at their free ends (contact area) at a very small distance and hermetically sealed in a glass tube. The contact area is plated with contact material such as Ruthenium or Rhodium. In presence of a magnetic field the reeds become magnetized the opposite polarity, thus attracting each other and closing contact.

faq1_en

What are the advantages of Reed Switches?

  • Non-touch switching
  • Highly economic
  • No supply current required
  • No minimum switching current necessary (except e.g. for Tungsten contact material)
  • High reliable switching
  • Low contact resistance (0.07 to 0.2 Ohms initial)
  • Even suitable for ex-protected and harsh environment, since contacts are hermetically sealed
  • Billions of operations at signal loads through lifetime

Reed Sensors

Part Number Description
MS-313-3Contact form A
Power: 10 W
Switching Voltage: 150 VDC
Dimensions: 12.7 x 9.9 x 3.5
MS-313R-3Contact form A
Power: 10 W
Switching Voltage: 150 VDC
Dimensions: 12.7 x 9.9 x 3.5
MS-324-3Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 23 x 13.9 x 5.9
MS-324-4Contact form C
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 23 x 13.9 x 5.9
MS-324-5Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 23 x 13.9 x 5.9
MS-324-7Contact form B
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 23 x 13.9 x 5.9
MS-324R-3Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 23 x 13.9 x 5.9
MS-324R-4Contact form C
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 23 x 13.9 x 5.9
MS-324R-5Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 23 x 13.9 x 5.9
MS-324R-7Contact form B
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 23 x 13.9 x 5.9
MS-328-3Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 28.5 x 19 x 6.3
MS-328-4Contact form C
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 28.5 x 19 x 6.3
MS-328-5Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 23 x 13.9 x 5.9
MS-328-6Contact form A
Power: 50 W
Switching Voltage: 200 VDC
Dimensions: 28.5 x 19 x 6.3
MS-328-7Contact form B
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 28.5 x 19 x 6.3
MS-332-3Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 33 x 10 x 6
MS-332-5Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 33 x 10 x 6
MS-332-6Contact form A
Power: 50 W
Switching Voltage: 200 VDC
Dimensions: 33 x 10 x 6
MS-332-7Contact form B
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 33 x 10 x 6
Part Number Description
MS-2431-3Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 31 x 9.3
MS-2431-4Contact form C
Power: 3 W
Switching Voltage: 30 VDC
Dimensions: 31 x 9.3
MS-2431-7Contact form B
Power: 3 W
Switching Voltage: 30 VDC
Dimensions: 31 x 9.3
Part Number Description
MS-320-3Contact form A
Power: 10 W
Switching Voltage: 180 VDC
Dimensions: 20 x 11 x 6
MS-390-3Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 27 x 8 x 8
MS-390-4Contact form C
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 27 x 8 x 8
MS-390-5Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 27 x 8 x 8
Part Number Description
MKContact form A
Power: 10 W
Switching Voltage: 150 VDC
Dimensions: 12 x 6 x 4.3
MS-104-3Contact form A
Power: 10 W
Switching Voltage: 150 VDC
Dimensions: 11.4 x 2.7 x 2.8
MS-105-3Contact form A
Power: 10 W
Switching Voltage: 150 VDC
Dimensions: 14.4 x 2.8 x 3.2
MS-106-3Contact form A
Power: 10 W
Switching Voltage: 180 VDC
Dimensions: 17 x 2.8 x 3.2
MS-107-3Contact form A
Power: 10 W
Switching Voltage: 180 VDC
Dimensions: 19.7 x 2.8 x 3.2
MS-108-3Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 22.3 x 3.3 x 4.2
MS-108-4Contact form C
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 22.3 x 3.3 x 4.2
MS-108-5Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 22.3 x 3.3 x 4.2
MS-110XNo photo availableContact form E
Power: 5 W
Switching Voltage: 140 VDC
Dimensions: 29 x 3.8 x 5.7
Part Number Description
MS-208-3Contact form A
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 9 x 3
MS-209-3Contact form A
Power: 10 W
Switching Voltage: 150 VDC
Dimensions: 10 x 3 / 2.7
MS-210-3Contact form A
Power: 10 W
Switching Voltage: 150 VDC
Dimensions: 12.7 x 3.8
MS-211-3Contact form A
Power: 10 W
Switching Voltage: 150 VDC
Dimensions: 12.2 x 3.8
MS-213-3Contact form A
Power: 10 W
Switching Voltage: 180 VDC
Dimensions: 18 x 3.8
MS-214-3Contact form A
Power: 10 W
Switching Voltage: 180 VDC
Dimensions: 25.2 x 3.8
MS-215-3Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 25.7 x 6
MS-215-4Contact form C
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 25.7 x 6
MS-215-5Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 25.7 x 6
MS-215-7Contact form B
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 25.7 x 6
MS-216-3Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 25.2 x 5.6
MS-216-4Contact form C
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 25.2 x 5.6
MS-216-5Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 25.2 x 5.6
MS-216-7Contact form B
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 25.2 x 5.6
MS-217-3Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 40.1 x 6
MS-217-4Contact form C
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 40.1 x 6
MS-217-5Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 40.1 x 6
MS-217-6Contact form A
Power: 50 W
Switching Voltage: 200 VDC
Dimensions: 40.1 x 6
MS-217-7Contact form A
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 40.1 x 5.6
PRX+1500Contact form A
Power: 1 W
Switching Voltage: 30 VDC
Dimensions: 12.2 x 2.41
Part Number Description
MS-2210M-3Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 38 x 9.5
MS-2210M-6Contact form A
Power: 50 W
Switching Voltage: 200 VDC
Dimensions: 38 x 9.5
MS-2212M-3Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 38 x 11.5
MS-2212M-6Contact form A
Power: 50 W
Switching Voltage: 200 VDC
Dimensions: 38 x 11.5
MS-225-3Contact form A
Power: 10 W
Switching Voltage: 180 VDC
Dimensions: 24.9 x 4.8
MS-226M-3Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 38 x 5.5
MS-228-3Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 38 x 7.7
MS-228-4Contact form C
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 38 x 7.7
MS-228-5Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 38 x 7.7
MS-228-6Contact form A
Power: 50 W
Switching Voltage: 200 VDC
Dimensions: 38 x 7.7 x 6
MS-228-7Contact form B
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 38 x 7.7
MS-228M-3Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 38 x 7.8
MS-228M-6Contact form A
Power: 50 W
Switching Voltage: 200 VDC
Dimensions: 38 x 7.8

Reed Switches

Part Number Description
HSR-0025RTContact form A
Power: 0.25 W
Switching Voltage: 30 VDC
Dimensions: 4.32 x 0.97 x 1.27
HSR-0035RTContact form A
Power: 1 W
Switching Voltage: 30 VDC
Dimensions: 5.08 x 1.4
HSR-502Contact form C
Power:3 W
Switching Voltage: 30 VDC
Dimensions: 8 x 2.4
PMC-0701Contact form A
Power: 10 W
Switching Voltage: 150 VDC
Dimensions: 7 x 1.8
Part Number Description
PMC-1001Contact form A
Power: 10 W
Switching Voltage: 180 VDC
Dimensions: 10 x 1.8
PMC-1401Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 14.2 x 2.3
PMC-1402Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 14.2 x 2.3
PMC-1496BContact form C
Power: 20 W
Switching Voltage: 150 VDC
Dimensions: 14.5 x 2.2
PMC-1496SContact form C
Power: 20 W
Switching Voltage: 150 VDC
Dimensions: 14.5 x 2.2
PMC-1515Contact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 15.3 x 2.3
PMC-1601Contact form A
Power: 10 W
Switching Voltage: 100 VDC
Dimensions: 16.5 x 2.5
PMC-2003Contact form A
Power: 10 W
Switching Voltage: 180 VDC
Dimensions: 21 x 3
TRH-200BContact form C
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 14.8 x 2.7
TRH-200SContact form C
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 14.8 x 2.7
Part Number Description
CRH-500Contact form C
Power: 60 W
Switching Voltage: 500 VDC
Dimensions: 39.7 x 5.4
HSR-634WTContact form C
Power: 100 W
Switching Voltage: 120 VDC
Dimensions: 34.3 x 5.33
HSR-834WTContact form C
Power: 100 W
Switching Voltage: 500 VDC
Dimensions: 34.3 x 5.33
PMC-2021Contact form A
Power: 50 W
Switching Voltage: 200 VDC
Dimensions: 20 x 2.54
PMC-3617Contact form C
Power: 60 W
Switching Voltage: 400 VDC
Dimensions: 36 x 5.6
PMC-5001Contact form A
Power: 120 W
Switching Voltage: 250 VDC
Dimensions: 50 x 5.4
PMC-5002Contact form A
Power: 250 W
Switching Voltage: 250 VDC
Dimensions: 50 x 5.4
PMC-5025Contact form C
Power: 60 W
Switching Voltage: 230 VDC
Dimensions: 52 x 5.6
Part Number Description
HSR-V10KContact form A
Power: 50 W
Switching Voltage: 5000 VDC
Dimensions: 53.4 x 5.4
HSR-V15KContact form A
Power: 50 W
Switching Voltage: 6000 VDC
Dimensions: 53.4 x 5.4
HSR-V207Contact form A
Power: 200 W
Switching Voltage: 3500 VDC
Dimensions: 53.4 x 5.4
HSR-V7KContact form A
Power: 50 W
Switching Voltage: 4000 VDC
Dimensions: 53.4 x 5.4
PMC-1401XContact form E
Power: 5 W
Switching Voltage: 140 VDC
Dimensions: 14.2 x 3 x 4.8
PMC-5002XContact form E
Power: 150 W
Switching Voltage: 230 VDC
Dimensions: 50 x 6.2 x 9.8
PMC-5025XContact form E
Power: 40 W
Switching Voltage: 200 VDC
Dimensions: 52 x 6 x 9.5

SMD Reed Switches

Part Number Description
PMC-0701SContact form A
Power: 10 W
Switching Voltage: 150 VDC
Dimensions: 7 x 1.8
PMC-1001SContact form A
Power: 10 W
Switching Voltage: 180 VDC
Dimensions: 10 x 1.8
PMC-1401SContact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 14.2 x 2.3
PMC-1402SContact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 14.2 x 2.3
PMC-1424SContact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 14.2 x 2.3
PMC-1428SContact form A
Power: 10 W
Switching Voltage: 100 VDC
Dimensions: 14.2 x 2.3
PMC-2021SContact form A
Power: 50 W
Switching Voltage: 200 VDC
Dimensions: 20 x 2.54
Part Number Description
HSR-0025TSMContact form A
Power: 0.25 W
Switching Voltage: 30 VDC
Dimensions: 6.1 x 1.27 x 1.27
PMC-0701TSContact form A
Power: 10 W
Switching Voltage: 150 VDC
Dimensions: 9.8 x 2 x 2.3
PMC-1001TContact form A
Power: 10 W
Switching Voltage: 180 VDC
Dimensions: 16 x 2 x 2.3
PMC-1001TSContact form A
Power: 10 W
Switching Voltage: 180 VDC
Dimensions: 12.8 x 2 x 2.3
PMC-1401TContact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 19.5 x 2.3 x 2.5
PMC-1401TSContact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 18.3 x 2.3 x 2.5
PMC-1424TContact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 19.5 x 3 x 2.5
PMC-1424TSContact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 18.4 x 3 x 2.5
PMC-1428TContact form A
Power: 10 W
Switching Voltage: 100 VDC
Dimensions: 19.5 x 3 x 2.5
PMC-1428TSContact form A
Power: 10 W
Switching Voltage: 100 VDC
Dimensions: 18.4 x 3 x 2.5
PMC-2021TContact form A
Power: 50 W
Switching Voltage: 200 VDC
Dimensions: 28.6 x 3 x 2.54
Part Number Description
PMC-0508THContact form A
Power: 5 W
Switching Voltage: 175 VDC
Dimensions: 6.5 x 2.3 x 2.9
PMC-0701THContact form A
Power: 10 W
Switching Voltage: 150 VDC
Dimensions: 8.5 x 2.8 x 2.9
PMC-1001THContact form A
Power: 10 W
Switching Voltage: 180 VDC
Dimensions: 16.25 x 2.8 x 2.5
PMC-1001THLContact form A
Power: 10 W
Switching Voltage: 180 VDC
Dimensions: 19.5 x 2.9 x 2.8
Part Number Description
PMC-1001THYContact form B
Power: 10 W
Switching Voltage: 180 VDC
Dimensions: 19.6 x 3 x 3.5
PMC-1424THXContact form E
Power: 5 W
Switching Voltage: 140 VDC
Dimensions: 19.6 x 3.2 x 3.5
Part Number Description
PRX+2131Contact form A
Power: 1 W
Switching Voltage: 30 VDC
Dimensions: 8.51 x 1.8 x 2.34
PRX+2463Contact form A
Power: 0.25 W
Switching Voltage: 30 VDC
Dimensions: 5.33 x 1.57 x 1.52
Part Number Description
PMC-0701ZContact form A
Power: 10 W
Switching Voltage: 150 VDC
Dimensions: 7 x 1.8
PMC-1001ZContact form A
Power: 10 W
Switching Voltage: 180 VDC
Dimensions: 10 x 1.8
PMC-1401ZContact form A
Power: 10 W
Switching Voltage: 200 VDC
Dimensions: 14.2 x 2.3
PMC-2021ZContact form A
Power: 50 W
Switching Voltage: 200 VDC
Dimensions: 20 x 2.54