with enhanced contact protection / shutter (Safety Plus)
screwless terminals for wires up to 2.5 mm2
without claws: ref.-no. with additional "N", e.g.: ..1520 N..
With screw terminals: ref.-no. ..1521..
Supporting frame, claws and claw screws are integrated into the earth protection...
to ensure protection level IP 44
for all flush-mounted switch/push-button inserts of the 500 range, SCHUKO® sockets with hinged lid, rotary switches and timer switch inserts
for all devices, covers and frames with blue "IP 44 marking"
in some cases with additional gaskets acc. to product description..