The 25.320.0453.1 is a 4-pole pluggable PCB Terminal Block with tin-plated bronze contacts. The plug-in terminal strip provides quick-connect and disconnect of PC board wiring. All metal parts are recessed or enclosed in the insulating body to provide circuit protections and dead-front safety. Insulating housings are made of polyamide 6.6 and captive nickel-plated brass screws are secured against loosening.