Fully Illuminated Toggle Switches Outstanding visual identification of toggle lever in all environmentsUnique switching mechanism gives reliable switching and smooth operationHigh insulating barriers protect against crossoverInterior o-ring protects contacts from oil, dust, water and other contaminantsThreaded bush mounting - M12Solder tag connections, epoxy sealed to prevent entry of flux, solvents, etc and provides mechanical supportWithstands 20kV ESD minimumUL94V-0 flammability rated base Note LED circuit is isolated and requires external power source. Polarity marks are on the bottom of the switch. If the source voltage (Vs) exceeds the rated voltage, a ballast resistor is required.