For easy selection of AT band and Magnet for an application, we offer Actuation distances for the MO-1422 Miniature Off-Centre Contact Reed Switch in cropped, SMD , Horizontal Mount and Vertical Mount formations. The various combinations of standard AT Bands and magnets are covered, from the lower AT bands to the higher AT bands. Each AT band lists distances when actuated with our standard magnets. Although some of the AT band / magnet combinations of this MO-1422 Reed Switch will produce similar actuating distances, selecting the right AT band and magnet for an application is important. Our Usage Notes below addresses these topics.
All distances given are in mm and standard tolerances of ±0.5 mm apply.
Magnet actuation direction
Operate Band 15-25 (AT)
Magnet Dimensions Operate DistanceRelease DistanceNDR-T 4.0 x 1.5 x 1.5 1.0 – 2.5 2.0 – 3.0 NDR-S 6.0 x 2.5 x 2.5 5.0 – 7.0 6.0 – 7.5 NDR-M 8.0 x 3.0 x 3.0 7.5 – 10.0 9.0 – 11.0 NDR-I 12.0 x 3.5 x 3.5 10.5 – 13.5 12.0 – 14.5 NDR-L 19.0 x 4.0 x 4.0 14.0 – 18.0 16.5 – 19.0 NDC-T Ø2.0 x 4.0 1.5 – 3.5 2.5 – 4.0 NDC-S Ø3.0 x 7.0 6.5 – 8.5 8.0 – 9.0 NDC-M Ø4.0 x 10.0 9.5 – 12.5 11.0 – 13.5 NDC-I Ø6.0 x 12.0 15.5 – 20.0 18.0 – 21.0 NDC-L Ø8.0 x 15.0 21.0 – 26.0 24.0 – 28.0
Operate Band 25-35 (AT)
Magnet Dimensions Operate Distance Release Distance NDR-T 4.0 x 1.5 x 1.5 0.5 – 1.0 1.5 – 2.0 NDR-S 6.0 x 2.5 x 2.5 4.0 – 5.0 5.5 – 6.0 NDR-M 8.0 x 3.0 x 3.0 6.5 – 7.5 8.5 – 9.0 NDR-I 12.0 x 3.5 x 3.5 9.5 – 10.5 11.0 – 12.0 NDR-L 19.0 x 4.0 x 4.0 12.0 – 14.0 15.5 – 16.5 NDC-T Ø2.0 x 4.0 1.0 – 1.5 2.0 – 2.5 NDC-S Ø3.0 x 7.0 5.0 – 6.5 7.0 – 8.0 NDC-M Ø4.0 x 10.0 8.0 – 9.5 10.0 – 11.0 NDC-I Ø6.0 x 12.0 13.5 – 15.5 17.0 – 18.0 NDC-L Ø8.0 x 15.0 19.0 – 21.0 23.0 – 24.0
Operate Band 35-45 (AT)
Magnet Dimensions Operate Distance Release Distance NDR-T 4.0 x 1.5 x 1.5 N/A N/A NDR-S 6.0 x 2.5 x 2.5 3.5 – 4.0 5.5 – 5.5 NDR-M 8.0 x 3.0 x 3.0 5.5 – 6.5 8.0 – 8.5 NDR-I 12.0 x 3.5 x 3.5 8.5 – 9.5 10.5 – 11.0 NDR-L 19.0 x 4.0 x 4.0 11.0 – 12.0 14.5 – 15.5 NDC-T Ø2.0 x 4.0 0.5 – 1.0 2.0 – 2.5 NDC-S Ø3.0 x 7.0 4.5 – 5.0 6.0 – 7.0 NDC-M Ø4.0 x 10.0 7.5 – 8.0 9.5 – 10.0 NDC-I Ø6.0 x 12.0 12.5 – 13.5 16.5 – 17.0 NDC-L Ø8.0 x 15.0 18.0 – 19.0 22.0 – 23.0
Operate Band 45-50 (AT)
Magnet Dimensions Operate Distance Release Distance NDR-T 4.0 x 1.5 x 1.5 N/A N/A NDR-S 6.0 x 2.5 x 2.5 3.0 – 3.5 4.0 – 5.0 NDR-M 8.0 x 3.0 x 3.0 5.0 – 5.5 7.0 – 8.0 NDR-I 12.0 x 3.5 x 3.5 8.0 – 8.5 10.0 – 10.5 NDR-L 19.0 x 4.0 x 4.0 10.5 – 11.0 14.5 – 15.0 NDC-T Ø2.0 x 4.0 N/A N/A NDC-S Ø3.0 x 7.0 4.0 – 4.5 5.0 – 6.0 NDC-M Ø4.0 x 10.0 7.0 – 7.5 9.0 – 9.5 NDC-I Ø6.0 x 12.0 12.0 – 12.5 16.0 – 16.5 NDC-L Ø8.0 x 15.0 17.5 – 18.0 21.0 – 22.0
Magnet actuation direction
Operate Band 15-25 (AT)
Magnet Dimensions Operate Distance Release Distance NDR-T 4.0 x 1.5 x 1.5 1.5 – 2.0 2.0 – 2.5 NDR-S 6.0 x 2.5 x 2.5 5.0 – 6.5 6.0 – 7.0 NDR-M 8.0 x 3.0 x 3.0 8.5 – 9.5 10.0 – 10.5 NDR-I 12.0 x 3.5 x 3.5 11.0 – 13.0 13.0 – 14.0 NDR-L 19.0 x 4.0 x 4.0 15.0 – 17.0 17.5 – 18.0 NDC-T Ø2.0 x 4.0 2.0 – 2.5 2.5 – 3.0 NDC-S Ø3.0 x 7.0 6.5 – 8.0 8.0 – 8.5 NDC-M Ø4.0 x 10.0 10.0 – 12.0 12.0 – 13.0 NDC-I Ø6.0 x 12.0 17.0 – 18.5 19.5 – 20.0 NDC-L Ø8.0 x 15.0 22.0 – 26.5 25.0 – 27.5
Operate Band 25-35 (AT)
Magnet Dimensions Operate Distance Release Distance NDR-T 4.0 x 1.5 x 1.5 1.0 – 1.5 1.5 – 2.0 NDR-S 6.0 x 2.5 x 2.5 4.0 – 5.0 5.5 – 6.0 NDR-M 8.0 x 3.0 x 3.0 7.0 – 8.5 9.0 – 10.0 NDR-I 12.0 x 3.5 x 3.5 10.0 – 11.0 12.0 – 13.0 NDR-L 19.0 x 4.0 x 4.0 12.5 – 15.0 16.0 – 17.5 NDC-T Ø2.0 x 4.0 1.5 – 2.0 2.0 – 2.5 NDC-S Ø3.0 x 7.0 5.0 – 6.5 7.0 – 8.0 NDC-M Ø4.0 x 10.0 9.0 – 10.0 11.0 – 12.0 NDC-I Ø6.0 x 12.0 14.0 – 17.0 18.0 – 19.5 NDC-L Ø8.0 x 15.0 20.0 – 22.0 24.0 – 25.0
Operate Band 35-45 (AT)
Magnet Dimensions Operate Distance Release Distance NDR-T 4.0 x 1.5 x 1.5 0.5 – 1.0 1.5 – 2.0 NDR-S 6.0 x 2.5 x 2.5 3.5 – 4.0 5.0 – 5.5 NDR-M 8.0 x 3.0 x 3.0 6.0 – 7.0 8.5 – 9.0 NDR-I 12.0 x 3.5 x 3.5 9.0 – 10.0 11.5 – 12.0 NDR-L 19.0 x 4.0 x 4.0 11.0 – 12.5 15.5 – 16.0 NDC-T Ø2.0 x 4.0 1.0 – 1.5 2.0 – 2.5 NDC-S Ø3.0 x 7.0 4.0 – 5.0 6.5 – 7.0 NDC-M Ø4.0 x 10.0 7.0 – 9.0 10.5 – 11.0 NDC-I Ø6.0 x 12.0 13.5 – 14.0 17.5 – 18.0 NDC-L Ø8.0 x 15.0 18.0 – 20.0 23.0 – 24.0
Operate Band 45-50 (AT)
Magnet Dimensions Operate Distance Release Distance NDR-T 4.0 x 1.5 x 1.5 N/A N/A NDR-S 6.0 x 2.5 x 2.5 3.0 – 3.5 4.5 – 5.0 NDR-M 8.0 x 3.0 x 3.0 5.5 – 6.0 8.0 – 8.5 NDR-I 12.0 x 3.5 x 3.5 8.5 – 9.0 11.0 – 11.5 NDR-L 19.0 x 4.0 x 4.0 10.5 – 11.0 14.5 – 15.5 NDC-T Ø2.0 x 4.0 0.5 – 1.0 1.5 – 2.0 NDC-S Ø3.0 x 7.0 4.0 – 4.5 6.0 – 6.5 NDC-M Ø4.0 x 10.0 6.5 – 7.0 10.0 – 10.5 NDC-I Ø6.0 x 12.0 13.0 – 13.5 17.0 – 17.5 NDC-L Ø8.0 x 15.0 17.0 – 18.0 22.0 – 23.0
Magnet actuation direction
Operate Band 15-25 (AT)
Magnet Dimensions Operate Distance Release Distance NDR-T 4.0 x 1.5 x 1.5 1.5 – 2.0 2.0 – 2.5 NDR-S 6.0 x 2.5 x 2.5 5.0 – 6.0 6.5 – 7.0 NDR-M 8.0 x 3.0 x 3.0 8.0 – 10.0 10.0 – 11.0 NDR-I 12.0 x 3.5 x 3.5 11.0 – 13.0 13.5 – 14.5 NDR-L 19.0 x 4.0 x 4.0 15.0 – 18.0 19.0 – 20.0 NDC-T Ø2.0 x 4.0 2.0 – 2.5 2.5 – 3.5 NDC-S Ø3.0 x 7.0 6.0 – 8.0 8.0 – 9.0 NDC-M Ø4.0 x 10.0 10.0 – 12.0 12.5 – 13.5 NDC-I Ø6.0 x 12.0 16.0 – 20.0 20.0 – 22.0 NDC-L Ø8.0 x 15.0 23.0 – 26.0 28.0 – 29.0
Operate Band 25-35 (AT)
Magnet Dimensions Operate Distance Release Distance NDR-T 4.0 x 1.5 x 1.5 0.5 – 1.5 1.0 -2.0 NDR-S 6.0 x 2.5 x 2.5 3.5 – 5.0 4.5 – 6.5 NDR-M 8.0 x 3.0 x 3.0 6.0 – 8.0 8.0 – 10.0 NDR-I 12.0 x 3.5 x 3.5 9.0 – 11.0 11.0 – 13.5 NDR-L 19.0 x 4.0 x 4.0 11.0 – 15.0 14.5 – 19.0 NDC-T Ø2.0 x 4.0 1.0 – 2.0 1.5 – 2.5 NDC-S Ø3.0 x 7.0 4.5 – 6.0 6.0 – 8.0 NDC-M Ø4.0 x 10.0 8.0 – 10.0 10.0 – 12.5 NDC-I Ø6.0 x 12.0 13.5 – 16.0 16.5 – 20.0 NDC-L Ø8.0 x 15.0 19.0 – 23.0 23.0 – 28.0
Operate Band 35-45 (AT)
Magnet Dimensions Operate Distance Release Distance NDR-T 4.0 x 1.5 x 1.5 N/A N/A NDR-S 6.0 x 2.5 x 2.5 3.0 – 3.5 4.5 – 5.0 NDR-M 8.0 x 3.0 x 3.0 5.5 – 6.0 7.5 – 8.0 NDR-I 12.0 x 3.5 x 3.5 8.5 – 9.0 10.5 – 11.0 NDR-L 19.0 x 4.0 x 4.0 10.5 – 11.0 13.5 – 14.5 NDC-T Ø2.0 x 4.0 0.5 – 1.0 1.0 – 1.5 NDC-S Ø3.0 x 7.0 4.0 – 4.5 5.5 – 6.0 NDC-M Ø4.0 x 10.0 7.5 – 8.0 9.5 – 10.0 NDC-I Ø6.0 x 12.0 12.5 – 13.5 15.5 – 16.5 NDC-L Ø8.0 x 15.0 18.0 – 19.0 22.0 – 23.0
Operate Band 45-50 (AT)
Magnet Dimensions Operate Distance Release Distance NDR-T 4.0 x 1.5 x 1.5 N/A N/A NDR-S 6.0 x 2.5 x 2.5 2.5 – 3.0 4.0 – 4.5 NDR-M 8.0 x 3.0 x 3.0 4.5 – 5.5 7.0 – 7.5 NDR-I 12.0 x 3.5 x 3.5 8.0 – 8.5 10.0 – 10.5 NDR-L 19.0 x 4.0 x 4.0 10.0 – 10.5 13.0 – 13.5 NDC-T Ø2.0 x 4.0 N/A N/A NDC-S Ø3.0 x 7.0 3.5 – 4.0 5.0 – 5.5 NDC-M Ø4.0 x 10.0 7.0 – 7.5 9.0 – 9.5 NDC-I Ø6.0 x 12.0 12.0 – 12.5 15.0 – 15.5 NDC-L Ø8.0 x 15.0 17.0 – 18.0 21.0 – 22.0
Magnet actuation direction
Operate Band 15-25 (AT)
Magnet Dimensions Operate Distance Release Distance NDR-T 4.0 x 1.5 x 1.5 1.5 – 2.5 2.0 – 3.0 NDR-S 6.0 x 2.5 x 2.5 5.0 – 7.0 6.0 – 8.0 NDR-M 8.0 x 3.0 x 3.0 8.0 – 11.0 10.0 – 12.5 NDR-I 12.0 x 3.5 x 3.5 11.0 – 14.5 13.0 – 16.0 NDR-L 19.0 x 4.0 x 4.0 14.0 – 19.0 16.0 – 21.0 NDC-T Ø2.0 x 4.0 2.0 – 3.0 2.5 – 3.5 NDC-S Ø3.0 x 7.0 6.0 – 9.0 8.0 – 10.0 NDC-M Ø4.0 x 10.0 10.0 – 13.0 12.5 – 14.5 NDC-I Ø6.0 x 12.0 17.0 – 21.0 20.0 – 23.0 NDC-L Ø8.0 x 15.0 23.0 – 29.0 27.0 -31.0
Operate Band 25-35 (AT)
Magnet Dimensions Operate Distance Release Distance NDR-T 4.0 x 1.5 x 1.5 1.0 – 1.5 1.5 – 3.0 NDR-S 6.0 x 2.5 x 2.5 4.5 – 5.0 5.5 – 6.0 NDR-M 8.0 x 3.0 x 3.0 7.5 – 8.0 9.5 – 10.0 NDR-I 12.0 x 3.5 x 3.5 10.0 – 11.0 12.5 – 13.5 NDR-L 19.0 x 4.0 x 4.0 13.0 – 14.0 15.0 – 16.0 NDC-T Ø2.0 x 4.0 1.5 – 2.0 2.0 – 2.5 NDC-S Ø3.0 x 7.0 5.5 – 6.0 7.0 – 8.0 NDC-M Ø4.0 x 10.0 9.0 – 10.0 11.0 – 12.5 NDC-I Ø6.0 x 12.0 15.0 – 17.0 19.0 – 20.0 NDC-L Ø8.0 x 15.0 21.0 – 23.0 25.0 – 27.0
Operate Band 35-45 (AT)
Magnet Dimensions Operate Distance Release Distance NDR-T 4.0 x 1.5 x 1.5 0.5 – 1.0 1.0 – 1.5 NDR-S 6.0 x 2.5 x 2.5 4.0 – 4.5 5.0 – 5.5 NDR-M 8.0 x 3.0 x 3.0 6.5 – 7.5 9.0 – 9.5 NDR-I 12.0 x 3.5 x 3.5 9.5 – 10.0 12.0 – 12.5 NDR-L 19.0 x 4.0 x 4.0 12.0 – 13.0 14.0 – 15.0 NDC-T Ø2.0 x 4.0 1.0 – 1.5 1.5 – 2.0 NDC-S Ø3.0 x 7.0 5.0 – 5.5 6.5 – 7.0 NDC-M Ø4.0 x 10.0 8.5 – 9.0 10.5 – 11.0 NDC-I Ø6.0 x 12.0 13.5 – 15.0 18.0 – 19.0 NDC-L Ø8.0 x 15.0 19.0 – 21.0 24.0 – 25.0
Operate Band 45-50 (AT)
Magnet Dimensions Operate Distance Release Distance NDR-T 4.0 x 1.5 x 1.5 N/A N/A NDR-S 6.0 x 2.5 x 2.5 3.0 – 4.0 4.5 – 5.0 NDR-M 8.0 x 3.0 x 3.0 6.0 – 6.5 8.5 – 9.0 NDR-I 12.0 x 3.5 x 3.5 8.5 – 9.5 11.5 – 12.0 NDR-L 19.0 x 4.0 x 4.0 10.0 – 12.0 13.5 – 14.0 NDC-T Ø2.0 x 4.0 0.5 – 1.5 1.0 – 1.5 NDC-S Ø3.0 x 7.0 4.5 – 5.0 6.0 – 6.5 NDC-M Ø4.0 x 10.0 7.0 – 8.5 10.0 – 10.5 NDC-I Ø6.0 x 12.0 12.0 – 13.5 17.5 – 18.0 NDC-L Ø8.0 x 15.0 17.0 – 19.0 23.0 – 24.0