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
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Activation Distances for HW-5052-L Reed Switch

For easy selection of AT band and Magnet for an application, we offer Actuation distances for the HW-5052-L Reed Switch in full length and cropped 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 will produce similar actuating distances, selecting the right AT band and magnet for an application is important. The following links will help understand AT Bands, Magnet types, and Magnet Selection better. All distances given are in mm and standard tolerances of ±0.5 mm apply.

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Actuation Distances for HW-5052-L Full Length Reed Switch

HW-5052 Full length reed switch dimension
All dimensions are in mm

HW-5052-L (40-50 AT)

Actuation Sketch Magnet Dimensions Operate Distance Release Distance
cropped reed switch actuation 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 Φ2.0 x 4.0
NDC-S Φ3.0 x 7.0
NDC-M Φ4.0 x 10
NDC-L Φ8.0 x 15.0

HW-5052-L (50-60 AT)

Actuation Sketch Magnet Dimensions Operate Distance Release Distance
cropped reed switch actuation 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 Φ2.0 x 4.0
NDC-S Φ3.0 x 7.0
NDC-M Φ4.0 x 10
NDC-L Φ8.0 x 15.0

HW-5052-L (60-70 AT)

Actuation Sketch Magnet Dimensions Operate Distance Release Distance
cropped reed switch actuation 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 Φ2.0 x 4.0
NDC-S Φ3.0 x 7.0
NDC-M Φ4.0 x 10
NDC-L Φ8.0 x 15.0

HW-5052-L (70-80 AT)

Actuation Sketch Magnet Dimensions Operate Distance Release Distance
cropped reed switch actuation 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 Φ2.0 x 4.0
NDC-S Φ3.0 x 7.0
NDC-M Φ4.0 x 10
NDC-L Φ8.0 x 15.0

HW-5052-L (80-85 AT)

Actuation Sketch Magnet Dimensions Operate Distance Release Distance
cropped reed switch actuation 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 Φ2.0 x 4.0
NDC-S Φ3.0 x 7.0
NDC-M Φ4.0 x 10
NDC-L Φ8.0 x 15.0

Actuation Distances for HW-5052-L Cropped Reed Switch

HW-5052 cropped reed switch dimension
HW-5052 cropped reed switch dimension
All dimensions are in mm

HW-5052-L (40-50 AT)

Actuation Sketch Magnet Dimensions Operate Distance Release Distance
cropped reed switch actuation distance
NDR-T 4.0 x 1.5 x 1.5 NA NA
NDR-S 6.0 x 2.5 x 2.5 1.0 – 2.5 3.0 – 5.0
NDR-M  8.0 x 3.0 x 3.0 3.5 -5.5 7.0 – 9.0
NDR-L 19.0 x 4.0 x 4.0 14.0 – 17.5 20.0 – 24.0
NDC-T Φ2.0 x 4.0 NA NA
NDC-S Φ3.0 x 7.0 2.0 – 3.0 4.0 – 6.0
NDC-M Φ4.0 x 10 7.0 – 10.0 12.0 – 14.5
NDC-L Φ8.0 x 15.0 25.0 – 29.0 34.0 – 38.0

HW-5052-L (50-60 AT)

Actuation Sketch Magnet Dimensions Operate Distance Release Distance
cropped reed switch actuation distance
NDR-T 4.0 x 1.5 x 1.5 NA NA
NDR-S 6.0 x 2.5 x 2.5 0.5 – 1.0 3.0 – 4.0
NDR-M 8.0 x 3.0 x 3.0 3.0 – 3.5 7.0 – 8.0
NDR-L 19.0 x 4.0 x 4.0 12.0 – 14.0 20.5 – 21.0
NDC-T Φ2.0 x 4.0 NA NA
NDC-S Φ3.0 x 7.0  1.0 – 2.0 4.0 – 5.0
NDC-M Φ4.0 x 10 6.0 – 8.0 12.0 – 13.0
NDC-L Φ8.0 x 15.0 22.0 – 25.0 33.0 – 34.0

HW-5052-L (60-70 AT)

Actuation Sketch Magnet Dimensions Operate Distance Release Distance
cropped reed switch actuation distance
NDR-T 4.0 x 1.5 x 1.5 NA NA
NDR-S 6.0 x 2.5 x 2.5 0 – 0.5 3.0 – 3.5
NDR-M 8.0 x 3.0 x 3.0 2.5 – 3.0 6.0 – 7.0
NDR-L 19.0 x 4.0 x 4.0  11.0 – 12.0 19.0 – 21.0
NDC-T Φ2.0 x 4.0 NA NA
NDC-S Φ3.0 x 7.0 0.5 – 1.0 3.0 – 4.0
NDC-M Φ4.0 x 10  5.0 – 6.0 10.5 – 12.0
NDC-L Φ8.0 x 15.0  20.0 – 23.0 31.0 – 33.0

HW-5052-L (70-80 AT)

Actuation Sketch Magnet Dimensions Operate Distance Release Distance
cropped reed switch actuation distance
NDR-T 4.0 x 1.5 x 1.5 NA NA
NDR-S 6.0 x 2.5 x 2.5 NA NA
NDR-M 8.0 x 3.0 x 3.0 1.5 – 2.5 6.0 – 7.0
NDR-L 19.0 x 4.0 x 4.0 10.0 – 11.0 19.0 – 20.0
NDC-T Φ2.0 x 4.0 NA NA
NDC-S Φ3.0 x 7.0 0 – 0.5 3.0 – 3.5
NDC-M Φ4.0 x 10 4.5 – 5.0 11.0 – 12.0
NDC-L Φ8.0 x 15.0 19.0 – 20.0 32.0 – 33.0

HW-5052-L (80-85 AT)

Actuation Sketch Magnet Dimensions Operate Distance Release Distance
cropped reed switch actuation distance
NDR-T 4.0 x 1.5 x 1.5 NA NA
NDR-S 6.0 x 2.5 x 2.5 NA NA
NDR-M 8.0 x 3.0 x 3.0 1.0 – 1.5  6.0 – 7.0
NDR-L 19.0 x 4.0 x 4.0 10.0 -11.0 17.0 – 20.0
NDC-T Φ2.0 x 4.0 NA NA
NDC-S Φ3.0 x 7.0 NA NA
NDC-M Φ4.0 x 10 4.0 – 4.5 10.5 – 11.0
NDC-L Φ8.0 x 15.0 18.0 – 9.0 28.0 – 33.0