The KSK-1C90U is a miniature (Form C) changeover reed switch or single pole double throw (SPDT) reed switch. Glass length of 14.0mm and diameter of 2.54mm. Rated power 10 W, Switching voltage 175 VDC, Switching current 0.5 Amp DC. Most used, UL approval.
General purpose, industrial, test and measurement (ATE)