A changeover reed switch has three contact leads. Form C or double throw switch described the switching function as break-before-make. The switching sequence is as follows. One contact opens its connection to another contact and then closes its connection to a third contact. Furthermore contact configuration is the number of switches or poles used in a component.
Basic technical specifications*
| Reed Switch Series | Overall Length (mm) |
Glass Length (mm) |
Glass Diameter (mm) | Lead Diameter (mm) | Contact Form | Pull-In Range (AT) | Rated Power Max. (W) |
| KSK-1C90F | 54,50 | 14,00 | 2,54 | 0,50 | 1C (Changeover) | 15 – 40 | 10 |
| KSK-1C90U | 56,10 | 14,00 | 2,54 | 0,50 | 1C (Changeover) | 15 – 40 | 10 |
| KSK-1C10 | 86,10 | 34,30 | 5,16 | 1,01 | 1C (Changeover) | 60 – 80 | 100 |
| MK23-90 | – | 14,00 | 2,54 | – | 1C (Changeover) | 15 – 40 | 10 |
* Complete technical specifications can be found in the contact series data sheet
- N.O. – Normally Open
- N.C. – Normally Close