Marquardt key switches 100ma 28v spst off on solder pins redgreenyellow led marquardt 64253121 a momentary key switch from marquardtfor use in ic technology microcomputers measuring and controlling devices electronic games switching and control systems household machines or telephone intercom systems its small dimensions allow it to be used in keypads with a minimum spacing of 155mm marquardt 64253121 key switch 100ma 28v spno pcb yellow led 19mm no cap