Why Choose the Mersen SFB395 Switch-Fuse Operating Shaft?
The Mersen SFB395 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 395 mm, it provides the mechanical connection between an enclosure-mounted operating handle and the disconnect switch mechanism installed inside the panel.
The SFB395 enables a compatible fusible disconnect switch to be operated safely from outside the electrical enclosure. Its substantial square-section construction provides secure engagement with the external handle and internal switch mechanism, supporting dependable transfer of rotational movement during switching and equipment isolation.
With its extended 395 mm shaft length, the SFB395 is particularly suitable for deep industrial switchboards and control cabinets where the switch mechanism is positioned a significant distance from the enclosure door. It is used with selected high-current Mersen switch-fuse assemblies, including compatible M1200 and M1250 configurations.
Key Advantages
- Purpose-designed operating shaft for Mersen UL 98 fusible disconnect switches.
- 12 × 12 mm square profile for positive mechanical engagement.
- 395 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 for demanding industrial switchgear applications.
Key Features
- Mersen switch-fuse operating accessory.
- Square operating shaft.
- 12 × 12 mm shaft section.
- 395 mm overall shaft length.
- Designed for selected Mersen UL 98 fusible disconnect switches.
- Compatible with selected M1200 and M1250 switch-fuse configurations.
- Supports handle and enclosure-door interlocking.
- Supplied as an individual shaft accessory.
Reliable External Operation for Deep Switchgear Enclosures
The Mersen SFB395 transfers rotational movement from an externally mounted operating handle to a compatible fusible disconnect switch located inside an electrical enclosure. This enables industrial equipment and power distribution circuits to be switched or isolated without opening the panel during normal operation.
The shaft works with compatible Mersen handle systems to support a door-interlocking arrangement that helps prevent the enclosure from being opened while the disconnect switch remains in the ON position. Its extended length accommodates deep cabinets and flexible internal switch mounting positions.
Typical Applications
- Deep industrial switchboards.
- UL 98 fusible disconnect switch assemblies.
- High-current power distribution systems.
- Motor control centres.
- OEM machinery and process equipment.
- Panel-mounted electrical isolation systems.
