D4N-4D26 Limit Switch. Offer configuration: 1 unit. Included components: 1 micro switch. This listing is for a sealed subminiature micro switch used in compact sensing, interlock, and snap-action control applications. Match the exact model, actuator style, lead-wire or solder-terminal format, current rating, and mounting layout before ordering. Mechanical actuator for position detection and end-of-travel safety in industrial equipment.