Hager SFT440 – Modular Mains-Generator Changeover Switch I-0-II 4P 40A 400V AC
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Description
Hager SFT440 – Modular Mains-Generator Changeover Switch I-0-II 4P 40A 400V AC
Hager SFT440 is a four-pole modular installation changeover switch with an I-0-II (1-0-2) switching arrangement, designed for manually switching between power sources — for example, between the mains supply and a generator. The common point brought out at the top makes it easier to organise the wiring in the switchboard. The device provides a rated current of 40 A at 400 V AC, making it suitable for typical three-phase residential, commercial and light-industrial installations. A mechanical durability of 200,000 cycles and an electrical durability of 25,000 cycles (AC21/AC22) guarantee many years of trouble-free operation. Its compact width of just 4 modules (70 mm) saves space on the DIN rail in the switchboard.
Key benefits for the installer
- The I-0-II arrangement with a neutral 0 position ensures safe disconnection of both sources before switching
- Common point at the top — clear routing of supply cables in the switchboard
- Screw terminals allow the connection of solid conductors up to 16 mm2 and flexible conductors up to 10 mm2
- Compliance with IEC 60947-3 and the RoHS directive confirms conformity with European safety requirements
- IP20 protection rating suitable for installation inside switchboard enclosures