Phoenix Contact 1788444 The direct plug-in block has a nominal cross-sectional area of 2.5 mm² and is coloured green, carrying a nominal current of 12 A at a rated voltage of 320 V for three-phase applications. It features a Sn contact surface with a pin connection type and has 12 potentials arranged in a single row, with each potential having 12 connections and a pitch of 5.08 mm. The plug-in system is the COMBICON MSTB 2,5, and it uses screw connections with tension sleeves, featuring an L slotted screw head and direct mounting capabilities.