DS Interlock Pushbutton Switches C&K Switches DS Interlock Pushbutton Switches are designed for door interlock systems. These rugged snap-mount switches provide latching or momentary actions to deliver a variety of integration options, including typical applications as a detection switch or a circuit interrupt in harsh environments. C&K Switches DS series delivers an extensive electrical life of up to 100,000 cycles. This allows frequent manual circuit interruptions, making the DS series ideal for multi-function security systems, gaming equipment, commercial appliances, and even HVAC applications that frequent manual circuit interruptions. The single- or double-pole double-throw switches are RoHS-compliant and made of halogen-free material.