Up until 35mm², the terminals feature a double cross-connection channel for plug-in cross-connectors. Screw-on cross-connectors located on the inside are used for the larger models.

The SRK range of protective earth terminals has also been extended by wire cross sections from 16 to 70 mm². Models up to 35mm² are contacted with the rail by simply snapping those on. The terminals are equipped with a large wire entry bay that facilitates the insertion of wires.