They are used for industrial applications requiring a high breaking capacity.
They perform the disconnector function and must not be used as switches (Utilization category: AC-20).
They can be equipped with an indicator light indicating blowing of the fuse cartridge.
They meet IEC/EN 60947-3 standard requirements.
Disconnection of all poles is guaranteed for the 2P, 3P, and 3P+N versions during factory assembly.
STI can use both gG and aM fuse cartridges without striker
gG fuses: used to provide both overload and short-circuit protection
aM fuses: used to provide only short-circuit protection of loads with high peak current such as motors, transformers primaries, etc.)
Available in both 8.5 x 31.5 mm and 10.3 x 38 mm diameters
Fuse cartridges meet IEC/EN 60269-1/2 (NFC 60-200).
used to quickly bridge several STI of the same kind.
Used to supply the busbar
For 25 mm2 cable
230 V neon indicator light
Indicates fuse blowing (off in normal operation and lit red after fuse blowing).
400 V maxi.
Locks the toggle in the "open" or "closed" position. Used with an 8 mm max. diameter padlock (not supplied).
Clip-on markers (C60 type): used to identify:
either on the front face of the device or on the downstream terminals.
captive fuse cartridge compartment makes it impossible to lose fuse cartridge
additional compartment for replacement fuse cartridge