Phoenix Contact COMBICON KDS 7.5mm PCB Terminal Block. COMBICON KDS Series modular terminal blocks with voltage and high current ratings and reliable mechanical anchoring. Features and Benefits. Voltage Rating 320 V Side stackable with dovetail keyed grooves Double pin soldering offers strong mechanical connection Test connector for 2 mm to 2.2 mm test plugs Wire acceptance: 6 mm² solid, 4 mm² standard Low temperature rise, thanks to maximum contact force