Actuation Distances for RM-1318 Reduced Miniature Reed Switches
For easy selection of AT band and Magnet for an application, we offer Actuation distances for the RM-1318 Reduced Miniature 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 the RM-1318 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.
Actuation Distances for Cropped Leads
Operate Band 10-20 (AT)
| Magnet | Dimensions | Operate Distance | Release Distance |
| NDR-T | 4.0 x 1.5 x 1.5 | ||
| NDR-S | 6.0 x 2.5 x 2.5 | ||
| NDR-M | 8.0 x 3.0 x 3.0 | ||
| NDR-L | 19.0 x 4.0 x 4.0 | ||
| NDC-T | Ø2.0 x 4.0 | ||
| NDC-S | Ø3.0 x 7.0 | ||
| NDC-M | Ø4.0 x 10.0 | ||
| NDC-L | Ø8.0 x 15.0 |
Operate Band 20-30 (AT)
| Magnet | Dimensions | Operate Distance | Release Distance |
| NDR-T | 4.0 x 1.5 x 1.5 | ||
| NDR-S | 6.0 x 2.5 x 2.5 | ||
| NDR-M | 8.0 x 3.0 x 3.0 | ||
| NDR-L | 19.0 x 4.0 x 4.0 | ||
| NDC-T | Ø2.0 x 4.0 | ||
| NDC-S | Ø3.0 x 7.0 | ||
| NDC-M | Ø4.0 x 10.0 | ||
| NDC-L | Ø8.0 x 15.0 |
Operate Band 30-40 (AT)
| Magnet | Dimensions | Operate Distance | Release Distance |
| NDR-T | 4.0 x 1.5 x 1.5 | ||
| NDR-S | 6.0 x 2.5 x 2.5 | ||
| NDR-M | 8.0 x 3.0 x 3.0 | ||
| NDR-L | 19.0 x 4.0 x 4.0 | ||
| NDC-T | Ø2.0 x 4.0 | ||
| NDC-S | Ø3.0 x 7.0 | ||
| NDC-M | Ø4.0 x 10.0 | ||
| NDC-L | Ø8.0 x 15.0 |
Actuation Distances for SMD Formed Leads
Operate Band 10-20 (AT)
| Magnet | Dimensions | Operate Distance | Release Distance |
| NDR-T | 4.0 x 1.5 x 1.5 | ||
| NDR-S | 6.0 x 2.5 x 2.5 | ||
| NDR-M | 8.0 x 3.0 x 3.0 | ||
| NDR-L | 19.0 x 4.0 x 4.0 | ||
| NDC-T | Ø2.0 x 4.0 | ||
| NDC-S | Ø3.0 x 7.0 | ||
| NDC-M | Ø4.0 x 10.0 | ||
| NDC-L | Ø8.0 x 15.0 |
Operate Band 20-30 (AT)
| Magnet | Dimensions | Operate Distance | Release Distance |
| NDR-T | 4.0 x 1.5 x 1.5 | ||
| NDR-S | 6.0 x 2.5 x 2.5 | ||
| NDR-M | 8.0 x 3.0 x 3.0 | ||
| NDR-L | 19.0 x 4.0 x 4.0 | ||
| NDC-T | Ø2.0 x 4.0 | ||
| NDC-S | Ø3.0 x 7.0 | ||
| NDC-M | Ø4.0 x 10.0 | ||
| NDC-L | Ø8.0 x 15.0 |
Operate Band 30-40 (AT)
| Magnet | Dimensions | Operate Distance | Release Distance |
| NDR-T | 4.0 x 1.5 x 1.5 | ||
| NDR-S | 6.0 x 2.5 x 2.5 | ||
| NDR-M | 8.0 x 3.0 x 3.0 | ||
| NDR-L | 19.0 x 4.0 x 4.0 | ||
| NDC-T | Ø2.0 x 4.0 | ||
| NDC-S | Ø3.0 x 7.0 | ||
| NDC-M | Ø4.0 x 10.0 | ||
| NDC-L | Ø8.0 x 15.0 |
Actuation Distances for Horizontal Mounting on PCBs
Operate Band 10-20 (AT)
| Magnet | Dimensions | Operate Distance | Release Distance |
| NDR-T | 4.0 x 1.5 x 1.5 | ||
| NDR-S | 6.0 x 2.5 x 2.5 | ||
| NDR-M | 8.0 x 3.0 x 3.0 | ||
| NDR-L | 19.0 x 4.0 x 4.0 | ||
| NDC-T | Ø2.0 x 4.0 | ||
| NDC-S | Ø3.0 x 7.0 | ||
| NDC-M | Ø4.0 x 10.0 | ||
| NDC-L | Ø8.0 x 15.0 |
Operate Band 20-30 (AT)
| Magnet | Dimensions | Operate Distance | Release Distance |
| NDR-T | 4.0 x 1.5 x 1.5 | ||
| NDR-S | 6.0 x 2.5 x 2.5 | ||
| NDR-M | 8.0 x 3.0 x 3.0 | ||
| NDR-L | 19.0 x 4.0 x 4.0 | ||
| NDC-T | Ø2.0 x 4.0 | ||
| NDC-S | Ø3.0 x 7.0 | ||
| NDC-M | Ø4.0 x 10.0 | ||
| NDC-L | Ø8.0 x 15.0 |
Operate Band 30-40 (AT)
| Magnet | Dimensions | Operate Distance | Release Distance |
| NDR-T | 4.0 x 1.5 x 1.5 | ||
| NDR-S | 6.0 x 2.5 x 2.5 | ||
| NDR-M | 8.0 x 3.0 x 3.0 | ||
| NDR-L | 19.0 x 4.0 x 4.0 | ||
| NDC-T | Ø2.0 x 4.0 | ||
| NDC-S | Ø3.0 x 7.0 | ||
| NDC-M | Ø4.0 x 10.0 | ||
| NDC-L | Ø8.0 x 15.0 |
Actuation Distances for Vertical Mounting on PCBs
Operate Band 10-20 (AT)
| Magnet | Dimensions | Operate Distance | Release Distance |
| NDR-T | 4.0 x 1.5 x 1.5 | ||
| NDR-S | 6.0 x 2.5 x 2.5 | ||
| NDR-M | 8.0 x 3.0 x 3.0 | ||
| NDR-L | 19.0 x 4.0 x 4.0 | ||
| NDC-T | Ø2.0 x 4.0 | ||
| NDC-S | Ø3.0 x 7.0 | ||
| NDC-M | Ø4.0 x 10.0 | ||
| NDC-L | Ø8.0 x 15.0 |
Operate Band 20-30 (AT)
| Magnet | Dimensions | Operate Distance | Release Distance |
| NDR-T | 4.0 x 1.5 x 1.5 | ||
| NDR-S | 6.0 x 2.5 x 2.5 | ||
| NDR-M | 8.0 x 3.0 x 3.0 | ||
| NDR-L | 19.0 x 4.0 x 4.0 | ||
| NDC-T | Ø2.0 x 4.0 | ||
| NDC-S | Ø3.0 x 7.0 | ||
| NDC-M | Ø4.0 x 10.0 | ||
| NDC-L | Ø8.0 x 15.0 |
Operate Band 30-40 (AT)
| Magnet | Dimensions | Operate Distance | Release Distance |
| NDR-T | 4.0 x 1.5 x 1.5 | ||
| NDR-S | 6.0 x 2.5 x 2.5 | ||
| NDR-M | 8.0 x 3.0 x 3.0 | ||
| NDR-L | 19.0 x 4.0 x 4.0 | ||
| NDC-T | Ø2.0 x 4.0 | ||
| NDC-S | Ø3.0 x 7.0 | ||
| NDC-M | Ø4.0 x 10.0 | ||
| NDC-L | Ø8.0 x 15.0 |
Related Links
Ampere Turn Selection
 | For any application, it is important to select the correct Ampere Turn (AT) or magnetic sensitivity of a Reed Switch, Reed Sensor or Continue reading Aug 27, 2020 |
Magnet Usage
 | Rectangular Magnets The storage and usage temperature of magnets should be within the individual raw material specification limits. It Continue reading Sep 4, 2019 |
Operating Characteristics of a Reed Switch
 | The following examples show typical operating characteristics of a reed switch when actuated with a magnet from various axes. Generally, Continue reading Sep 4, 2019 |
Magnet Information
 | In general, there are four families of magnets available commercially. Factors such as operating temperature, demagnetizing effects, Continue reading Nov 4, 2020 |