Socket + fine protection with Wago plug/clamp technology, front locking in graphite black. Channel socket 1-way and overvoltage protection, fine protection overvoltage category III, with increased contact protection, pre-wired, with quick fastening for front-locking device installation, can be connected in series using a 3-pin plug connector system. Cable connection via plug-in terminals 1.5 - 2.5 mm² or via reverse polarity protected plug connector system.