4mm & 6.2mm HCI Connector Systems TE Connectivity's 4mm and 6.2mm High Current Interconnect (HCI) Connector Systems are wire-to-wire and wire-to-board Connector systems with high electric current capacity, of up to 20A. These Connector systems feature flexible design, straight PCB mounting, and square-peg technology. The HCI Connector systems are ideal for business and retail equipment, industrial and appliances.