The KSK-1A54 series reed switch is a high frequency reed switch with glass length of 53.4mm and diameter of 5.4mm. This high frequency reed switch has a rated power 25 W, Switching voltage 500 VDC, Switching current 1.5 Amp DC.
Medical equipment, test and measurement (ATE), high power, high voltage, RF
Data Sheet Link https://standexelectronics.com/wp-content/uploads/datasheets/21/2115408090e.pdf