Why Choose the Mersen SFB280 Switch-Fuse Operating Shaft?
The Mersen SFB280 is a heavy-duty switch-fuse operating shaft designed for compatible Mersen UL 98 fusible disconnect switch assemblies. Featuring a robust 12 × 12 mm square profile and an overall length of 280 mm, it provides the mechanical connection between an enclosure-mounted operating handle and the switch mechanism installed inside the electrical panel.
The SFB280 allows a compatible fusible disconnect switch to be operated safely from outside the enclosure. Its substantial square-section design provides positive engagement with the external handle and internal switch mechanism, supporting dependable transfer of rotational movement during load switching and electrical isolation.
With its extended 280 mm shaft length, the SFB280 is particularly suitable for deep switchboards and control cabinets where the disconnect switch is positioned further away from the enclosure door. It is supplied as an individual shaft accessory and must be combined with a compatible Mersen switch-fuse and external operating handle.
Key Advantages
- Purpose-designed operating shaft for Mersen UL 98 fusible disconnect switches.
- 12 × 12 mm square profile for secure mechanical engagement.
- 280 mm overall length for deep electrical enclosures.
- Enables external operation of an internally mounted switch-fuse.
- Supports compatible enclosure door-interlocking arrangements.
- Heavy-duty construction suited to industrial switchgear assemblies.
Key Features
- Mersen switch-fuse operating accessory.
- Square operating shaft.
- 12 × 12 mm shaft section.
- 280 mm overall shaft length.
- Designed for selected Mersen UL 98 fusible disconnect switches.
- Connects an external operating handle to the internal switch mechanism.
- Supports door interlocking when used with compatible components.
- Supplied as an individual operating shaft.
Reliable External Operation for Deep Switchgear Enclosures
The Mersen SFB280 transfers rotational movement from an externally mounted operating handle to a compatible fusible disconnect switch located inside an electrical enclosure. This allows industrial equipment and power distribution circuits to be switched or isolated without opening the enclosure during normal operation.
The shaft end works with compatible Mersen handle systems to support an interlocking arrangement that helps prevent the enclosure door from being opened while the switch remains in the ON position. Its extended length accommodates deep panels and flexible internal switch mounting positions.
Typical Applications
- Deep industrial switchboards.
- UL 98 fusible disconnect switch assemblies.
- Motor control centres.
- Industrial power distribution equipment.
- OEM machinery and process systems.
- Panel-mounted electrical isolation systems.
