Reed Switch

Reed Switch Magnet Interaction

Standex-Meder Electronics

This tutorial will define key terms for magnets and reed switches.  Additionally, it will describe how the positioning of the magnet’s north and south poles relative to the reed switch, produces different magnetic field arrays.  Understanding these magnetic field arrays will give insight into how the magnet and reed switch form their sensing function.
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Related Parts

ImageManufacturer Part NumberDescriptionPackagingTypeCircuitAvailable Quantity
SENSOR REED SPST-NO 1A 15W SMDMK23-35-B-2SENSOR REED SPST-NO 1A 15W SMDCut Tape (CT)Glass BodySPST-NO5374 - Immediate
MK23-35-B-2 product page link
SENSOR REED SPST-NO 0.1A 1W SMDMK23-80-B-2SENSOR REED SPST-NO 0.1A 1W SMDCut Tape (CT)Glass BodySPST-NO4608 - Immediate
MK23-80-B-2 product page link
SWITCH REED 170VDC 10W AXLKSK-1A80-1015SWITCH REED 170VDC 10W AXLBulkGlass BodySPST-NO4297 - Immediate
KSK-1A80-1015 product page link
SENSOR REED SPST-NO 1A 10W SMDMK23-66-B-2SENSOR REED SPST-NO 1A 10W SMDCut Tape (CT)Glass BodySPST-NO8325 - Immediate
MK23-66-B-2 product page link
SWITCH REED 200VDC 20W AXLKSK-1A35-1015SWITCH REED 200VDC 20W AXLBulkGlass BodySPST-NO1988 - Immediate
KSK-1A35-1015 product page link
SWITCH REED 180VDC 10W AXLKSK-1A66-1015SWITCH REED 180VDC 10W AXLBulkGlass BodySPST-NO2513 - Immediate
KSK-1A66-1015 product page link
SWITCH REED 200VDC 10W AXLKSK-1A87-1015SWITCH REED 200VDC 10W AXLBulkGlass BodySPST-NO1161 - Immediate
KSK-1A87-1015 product page link
SENOSR REED SPDT 0.5A 10W SMDMK23-90-C-2SENOSR REED SPDT 0.5A 10W SMDCut Tape (CT)Glass BodySPDT3273 - Immediate
MK23-90-C-2 product page link
SENSOR REED SPST-NO 0.4A 10W SMDMK23-87-B-2SENSOR REED SPST-NO 0.4A 10W SMDCut Tape (CT)Glass BodySPST-NO3857 - Immediate
MK23-87-B-2 product page link
SWITCH REED 180VDC 10W AXLKSK-1A66-1520SWITCH REED 180VDC 10W AXLBulkGlass BodySPST-NO965 - Immediate
KSK-1A66-1520 product page link
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PTM Published on: 2012-03-21