Circular connector is a cylindrical, multi-pin electrical connector that contains contacts that power electrical devices, transmit data, or transmit electrical signals. A circular connector is designed to withstand harsh environments and reliably deliver data. It is designed with a circular interface and housing to quickly and easily connect and disconnect signal, power, and optical circuits without the use of coupling tools such as torque wrenches.

The connectors are suitable in harsh environmental applications, including aerospace, broadcast, defence and security, electronics, energy, industrial, instrumentation, medical, and transportation.