OTL universal terminal blocks are designed for copper and aluminum conductors. The terminals are suitable for all types of copper or aluminum conductors with cross-section up to 300 mm². Insulating covers of OTL universal terminals are made of polyamide PA 66, inflammability V-0, halogen free. The body of the connector is made of tinplated aluminum. The terminal has a shaped profile and its lower part is specially milled in order to prevent possible extraction of wires. Clamping screws are made of tinned aluminum, the contact part is covered with the contact paste. The clamping screw can be tightened by hexagonal wrench. Operating temperature is in the range of -25 °C to +80 °C. IP protection class for OTL terminals is IP20. 1000 V, UL 94 V-0. The requirements for connectors designated to be used with aluminum power cables are specified in standard EN 61238-1:2003.
Connectors that have been tested and certified in accordance with standard EN 61238-1:2003 are divided into two classes - class A and class B. OTL universal terminal blocks fulfill class A standard.