Binder’s Not Connected Closed Family Protects Contacts Between Connections
The Not Connected Closed (NCC) circular connectors use a spring-loaded cover to seal contacts when unmated, targeting applications needing frequent connection cycles and reliable ingress protection.
Most circular connectors are designed around what happens when they’re plugged in. Binder’s Not Connected Closed (NCC) family takes a different approach — it’s specifically engineered for what happens when they’re not.
The Core Idea: Protection in the Unmated State
Standard connectors leave their contacts exposed when disconnected, relying on protective caps or careful handling to keep out dust and moisture. Binder’s NCC family addresses this with an integrated, spring-loaded plastic cover built into the female panel-mount connector. The cover automatically closes the interface the moment the connector is unplugged.
Binder’s NCC family offers ingress protection, even when unmated. Image used courtesy of Binder
The protection ratings back this up. Series 670 (subminiature, 5-pin) achieves IP54 when unmated and IP67 when mated. Series 770 (miniature, 8-pin) reaches IP67 in both states. For equipment that gets frequently plugged and unplugged in industrial or lab environments, that’s a meaningful reduction in contamination risk without any extra steps from the user.
Both series use a bayonet locking system that allows tool-free mating with a single quarter-turn motion. Series 670 is rated for more than 1,000 mating cycles, while series 770 handles more than 5,000 — making either a reasonable choice for high-frequency connection applications. The spring mechanism driving the sealing cap is designed to maintain a consistent return force across the full rated cycle life.
Where the NCC Family Fits
The NCC connectors are aimed at applications where contamination control matters as much as electrical reliability. Automation, measurement and testing, laboratory equipment, and medical devices are all cited use cases.
Medical diagnostic equipment is a natural fit: connectors are disconnected between uses, hygiene requirements are strict, and liquid ingress protection needs to hold whether or not a cable is attached. Industrial sensor systems in dusty or humid environments benefit similarly — the panel connector stays sealed during maintenance or reconfiguration, without requiring staff to replace a dust cap.
For medical deployments, series 770 is available in a grey-white finish (similar to RAL 9002) using biocompatible materials compliant with ISO 10993-5. Both series use DEHP-free plastic construction throughout.
