The KSK-1A55 series reed switch is a high power reed switch with glass length of 16.5mm and diameter of 2.8mm. This reed switch has a rated power 50 W, Switching voltage 100 VDC, Switching current 0.5 Amp DC.
General purpose, test and measurement (ATE), high power
Data Sheet Link https://standexelectronics.com/viewer/pdfjs/web/viewer.php?file=https%3A%2F%2Fstandexelectronics.com%2Fwp-content%2Fuploads%2F2019%2F03%2FKSK-1A55_V03.pdf