Binder Introduces Not Connected Closed (NCC) Family of Connectors

Binder has launched a new circular connector solution that protects electrical interfaces even when not connected. The Not Connected Closed (NCC) connector family solves a common problem in industrial systems: exposed contacts when connectors are unplugged. It uses a spring-loaded sealing mechanism in the female panel connector that automatically closes a cover over the contacts, keeping out dust, dirt, and moisture.

The NCC circular connector family is available in subminiature and miniature variants. Image used courtesy of Binder

What Does “Not Connected Closed” Mean?

Most circular connectors only protect against the environment when fully connected. When unplugged, the panel-mounted contacts are exposed to dust, moisture, oils, and other contaminants, especially in industrial settings. Over time, this exposure can reduce the connector’s performance and reliability.

Binder’s new Not Connected Closed (NCC) connectors feature a design that solves the problem of exposed contacts by keeping the connector sealed even when unplugged. In NCC connectors, the female panel mount has a spring-loaded cover that closes over the contacts when unplugged. When a plug is inserted, it pushes the cover open to make electrical contact. This removes the need for separate protective caps and keeps the interface protected between uses.

Key Features of the NCC Connector Family

The NCC connectors come in the 670 and 770 series, both with compact circular designs that save space and offer built-in protection. The 670 series is a subminiature format with five contact pins, while the 770 series offers miniature connectors with eight contact pins. Both types support signal and low-power applications.

The two series use DEHP-free plastic housing for safety and environmental compliance. The female panel mount has a spring-loaded plastic cover that automatically shields the connector from the environment.

Binder offers different protection levels depending on whether the connector is plugged in. The 670 series provides IP54 protection when plugged in, guarding against dust and water splashes, and upgrades to IP67 when mated for even better protection. The 770 series offers IP67 protection whether connected or not, making it a good choice for dusty or humid workshops and ensuring reliable connections even with frequent use.

The NCC connectors are built for use in industrial, test and measurement, and medical applications. Image used courtesy of Adobe Stock

For healthcare applications, the 770 series comes in a medical-grade version designed for medical devices. It meets ISO 10993-5 standards, which test material biocompatibility for cytotoxicity. This ensures the connector is safe for use in clinical settings where it may come into contact with patients or sensitive medical environments.

Connector Design and Mechanical Performance

The new NCC connector series is made for quick installation and reliable use in systems where connectors are often plugged and unplugged during maintenance, testing, or setup. Both series use a bayonet locking mechanism that secures connections with a short twist instead of a threaded coupling. This design allows for fast, tool-free connection. Once locked, the mechanism resists accidental disconnection from vibrations or movement, ensuring stable performance.

Built for durability, the 670 series handles over 1,000 connect and disconnect cycles, while the 770 series supports more than 5,000 mating cycles. This high cycle rating is important in measurement systems, lab equipment, and modular industrial devices where connectors may be unplugged and reconnected many times but still need to maintain consistent electrical contact without frequent replacement.

Binder’s Focus on Practical Connector Innovation

Jana Wagner, Binder’s Product Manager, says the goal of the new NCC connector series is to combine strong protection, especially when disconnected, with easy, user-friendly operation. This shows the company’s focus on practical usability in industrial settings. The NCC solution offers a connector design that stays protected even when not connected, making it a good choice for users who need reliable performance and clean electrical connections.