Terminal blocks three ways (pins) in technical ceramics. Impressive properties and resistance to high temperature of ceramic enable to apply this type of terminal blocks in electrical devices for both industry as well as domestic users. In industry are used in extremely high temperature applications such as furnaces, heaters, process equipment and machinery. These special terminal blocks type SL allows the use of all cable termination ends, good visualization of the insertion of conductors (as ring and fork terminals) and long saddle tab avoid conductor shearing. Inserts and screws are in stainless steel.