The D4NL-4DFA-B-NPT Door & Interlock Switch, part of the D4NL series, is a reliable solution for industrial applications requiring secure access control. Constructed with durable plastic housing and featuring a screw mount for easy installation, this switch ensures seamless operation even in harsh environments with its IP67 rating. The 2NC + 2NC contact configuration guarantees dual-circuit safety, with a current rating of 10A and 2.5A, suitable for diverse power requirements. Illuminated with bright orange LED lights, the switch provides visual indication of status, enhancing safety protocols. With a voltage rating of 120V and 125V, it offers versatility in compatibility. The 1/2-14 NPT conduit thread size allows for convenient wiring. Perfect for use in machinery, the D4NL-4DFA-B-NPT is a critical component in maintaining operational integrity and preventing unauthorized access.