Product Description:

The 0TB704.91 push-in terminal block is produced by B & R Automation for the 0TB Terminal Blocks series. The component provides pluggable field wiring points that route control signals and power lines from panel interfaces to printed circuit assemblies inside industrial control hardware. In automation cabinets, it creates a removable interface that lets sensor, actuator, or supply wiring be disconnected without disturbing the base board. By combining spring-force contacts with coded housings, the block maintains consistent electrical contact while simplifying assembly and routine wiring changes in machinery, process equipment, and other space-limited control assemblies.

Its contacts are arranged on a 5.08 mm pitch, so boards with industry-standard hole grids can accept the header without extra drilling. Each conductor path exhibits a maximum contact resistance of 5 mΩ, which helps limit thermal rise at rated load. When ferruled leads are used, the cross-section may not exceed 1.50 mm², keeping the wire size within the range that the spring can hold securely over the product’s service life. The block carries up to 10 A per contact under continuous duty, and its insulation system withstands system potentials of up to 300 V relative to adjacent circuits.

For unferruled solid or stranded conductors, the permissible cross-section rises to 2.50 mm², giving more flexibility when longer runs or heavier loads require larger wire. The connector has 4 pins arranged in 1 row, which keeps the layout easy to identify on compact I/O cards. Current is transmitted through tinned copper contact clips that resist oxidation and retain spring pressure after repeated insertions. The single-row arrangement also helps keep wire entry orderly where board space is limited.