206305-4 is a CPC plug assembly size 23-37 circular connector housing designed for high-density signal transmission applications. The connector features a keyed mating alignment type to ensure proper orientation during connection, with 0 power positions and 37 signal positions for comprehensive signal routing. This receptacle-style connector is always EU RoHS/ELV compliant, meeting environmental and safety standards for industrial and commercial applications. The product is part of TE Connectivity's AMP brand circular I/O connector line and is designed to mate with corresponding receptacle assemblies such as the CPC receptacle sealed size 23-37. This connector is ideal for applications requiring reliable, keyed circular connections with multiple signal channels in compact form factors.