SPDB Series COMBI. Designed for connecting two conductors with the facility to bridge. Plug-in in connectors with Spring Cage connection for excellent resistance to vibration and constant connection. These plug-in connectors can be installed quickly and easily into your switchgear, panel build, control cabinet and can be used fro both signal and power wiring. Supported by Phoenix Contacts excellent range of accessories. Features and Benefits. Vibration resistant. Gas tight. Long-term stability. Fast and easy installation. High electrical connectivity. Low temperature rise. High chemical resistance. Halogen free and UV resistant. Applications. For use with basic terminal blocks, spring Cage connectors are ideally suited to situations where components are subject to harsh vibrations such as,. Rail industry. Wind power plants. Mechanical engineering. Process technology and engineering. Petrochemical industry