ML9 Illuminated SMT Tactile Switches Diptronics ML9 Illuminated Tactile Switches are 8.0mm x 8.4mm surface-mount type tact switches. The switches feature a 50mA, 32VDC contact rating, and 100mΩ maximum contact resistance. There are five color choices to choose from: green, orange, red, blue, and white. Diptronics ML9 Illuminated Tactile Switches applications include automotive, network equipment, telecommunications, medical equipment, and industrial controls.