48EM Series Miniature Sealed Pushbutton Switches ITW Switches 48EM Series of Miniature Sealed Pushbutton Switches is a rugged, multi-option series offering the most selections in mounting styles, colors, terminations, bezels, lighting and momentary or alternate-action switching. ITW's 48EM Series of Miniature Sealed Pushbutton Switches offers all these options in one compact package size.