Signaling switch for switch position open or closed for 3-pole MULTIBLOC 00 to 4 using microswitch 1x changeover contact, 5A, 250V. The MULTIBLOC 00 product range includes NH fuse switch disconnectors for NH fuse inserts in accordance with IEC/EN 60 269-2, VDE 0636-2, size 00 to 160A. The products are available in surface-mounted or busbar-mounted versions in 1-pole, 2-pole, 3-pole or 4-pole versions. MULTIBLOC NH fuse switch disconnectors of different sizes can be brought to the same level with suitable covers, which enables a common, flat central cover. The system is a modular system in which the various products can be optimally combined. MULTIBLOC enables the user to install quickly and easily and offers a high level of safety during installation and maintenance. It is suitable for use in house connection boxes, meter distributors, instrument transformer cabinets and telecom transmission stations.