Phoenix Contact 1308661 A coupler connector suitable for use in the PRC 20 range is characterized by its black color and five positions. It can accommodate conductor cross sections between 0.5 mm² and 2.5 mm², and is rated for a maximum voltage of 400 V and current of 20 A. Connection is achieved through a screw method, with contact type socket, and suitable cable diameters range from 8 mm to 14 mm. The connector also offers two setting options for release: one using a tool or by hand, and operates within the AC frequency scope.