LP37 Series Illuminated Pushbutton Switches E-Switch LP37 Series Illuminated Pushbutton Switches feature a right angle design, a full 5.1mm travel, and are available in multiple LED colors. With a SPDT contact arrangement, the E-Switch LP37 Series Illuminated Pushbutton Switches have a contact rating of 20mVDC to 50VDC, 10mA to 250mA and a contact resistance of 50mΩ. Ideal applications for the LP37 series are telecommunications, networking, low power on/off designs, computers, servers, and performance audio.