Phoenix Contact 3100091 A thermoelectric voltage terminal block pair with a TC type R designation features a nominal operating voltage of 400 V and a maximum current capacity of 1 A, accommodating four connections and spanning two positions. The connection method employs screw attachment at one level, while the cross-sectional area ranges from 0.2 mm² to 4 mm². Various mounting types are available, including NS 35/7.5, NS 35/15, and NS 32, with a standard color of gray.