Check the listing for details. SPDT or SPST Magnetic Reed Switch Changeover Normally Open. Condition: New. Listed at 16.49 USD. SPDT or SPST Magnetic Reed Switch Changeover Normally Open SPDT or SPST Magnetic Reed Switch Changeover Normally Open Reed switches featuring SPDT or SPST-NO contacts hemetically sealed within a glass tube. The switch features a quick response time and is lightweight making them suitable for low power applications. Dimensions: 2.5 x 16mm (diameter x length) Maximum switching voltage: 24VDC Dimensions: 4 x 36mm (diameter x length) Maximum switching voltage: 60VDC Dimensions: 4 x 36mm (diameter x length) Maximum switching voltage: 100VDC Dimensions: 2.5 x 16mm (diameter x length) Maximum switching voltage: 24VDC Dimensions: 3 x 20mm (diameter x length) Maximum switching voltage: 30VDC Dimensions: 4 x 38mm (diameter x length) Dimensions: 5 x 50mm (diameter x length) Maximum switching voltage.