1840434 Phoenix Contact MC 1.5/9-ST-3.5 9-pin Pluggable Terminal Block. The 1840379 from Phoenix Contact is a brilliant and well-known PCB terminal block. It comes from Phoenix’s brilliant range of ‘MINI COMBICON MC’ connectors and has a 3.5mm pitch, 0.14 – 1.5mm2 screw connection and horizontal wire entry. This PCB terminal block is massively versatile and allows connection of many products due to is worldwide known connection method and features a minimal temperature rise thank to its maximum contact force.