The 97 screw connectors for printed circuits offer exceptionally larger clearance and creepage distances which result in a higher breakdown voltage than the one provided by the smaller 94/95 series.
The 2 and 3 poles T-versions correspond technically respective standard types, with their dovetail conduction they can join together to a various long chain, the same construction also with various types.
DS-versions have wire protection, which protect circuits from damage through screws. The screws are locked to prevent accidental loosening.
The dimension of the threaded portion of the terminal body is 2 mm (M3 thread).