Miniature NCC circular connectors are made for medical and industrial markets

Over-moulded miniature cable connectors in the 770 NCC (Not Connected Closed) series by binder are designed for use in both the healthcare and industrial markets. The over-moulded cable connectors meet the typical challenges faced by both sectors, said binder.

The 770 NCC series of eight-pin cable connectors with bayonet lock and in a straight design. They are equipped with moulded, UL-approved PUR or PVC cables, making field assembly unnecessary. Standard cable lengths are two and five metres and other lengths are available on request. The cable cross-section is 8.0 x 0.25mm² and the cable jacket diameter is 6.0mm.

The bending radius of the cables in move is at least 10 times the cable diameter and at least five times the diameter for fixed cables. The maximum resistance of wire amounts to 79 Ohm per km. The over-moulded cable connectors are designed for a rated voltage of 175V at a rated current of 2.0A and withstand impulse voltages of up to 1750V. Operating temperature range extends from -25 to +85 degrees C and the mechanical service life is specified at 5,000 or more mating cycles.

When mated, the connectors meet IP67 for dust and temporary submersion. When unplugged, they offer IP54 protection against contact, dust and splashing water from all sides. The connectors are equipped with a bayonet locking system that ensures quick and safe mating and unmating.

Typically, connectors only comply with the protection degree specified in the data sheet when mated. When unplugged, covers or flaps protect them from environmental influences. However, these elements may affect ease of handling or interfere with the visual appearance of the system design. The design of the NCC connector includes a spring-loaded plastic cover inside the connector housing. It encloses the pins, protects them from particles, dust and splash water and protects against mechanical impact from the outside.

In medical engineering applications there are challenges in the design and manufacture of circular connectors. While smooth product surfaces are required for hygiene reasons (they prevent the accumulation of dirt and reduce the risk of contamination), they are problematic in clinical applications, because devices often have to be connected to others on site quickly and without the risk of contaminating the unmated flange part of the connection. 

Medical device manufacturers also demand a visually attractive design that fits seamlessly into equipment. The connector manufacturer is also expected to use the same tool for producing black and white versions – despite the different materials – while maintaining tight tolerances. 

There are similar demands in the industrial sector, for example in control and measurement, where the products have to withstand harsh process or climatic conditions.

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