The TSKA industrial terminal blocks family has several connection joints, insulated from each other. They are mainly used in industry and in measuring circuits, in control and energy distribution boxes. The terminal blocks can be used for jointing of circle section copper wires. The highly heat resistant, strong, self-extinguishing (according to UL94-V0) polyamide plastic house with good electrical parameters – witch contains the electrical elements - , is shaped in a way to permit the terminal block to be fixed onto mounting rails according standard EN 50022 („hat” or „C” rail).