The Phoenix Contact D-ST 2,5-QUATTRO is a four-part terminal block system that is used to transmits signals, control circuits, protect wiring, or connect DC power. It is suitable for both home and industrial applications. It features a space-saving design and features an integrated bridge for inserting a jumper. Its large clamping surfaces ensure secure connections, and its screwing system allows for easy installation and reworking. It is designed for use in control cabinet construction, appliance engineering, and industrial machinery.