Why Choose the Mersen SFB535 Switch-Fuse Operating Shaft?
The Mersen SFB535 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 535 mm, it provides the mechanical connection between an enclosure-mounted operating handle and the disconnect switch mechanism installed inside the electrical panel.
The SFB535 enables a compatible fusible disconnect switch to be operated safely from outside the enclosure. Its substantial square-section construction provides secure engagement with the external handle and internal switch mechanism, supporting dependable transfer of rotational movement during load switching and electrical isolation.
With its extended 535 mm shaft length, the SFB535 is particularly suited to deep industrial switchboards and large control cabinets. It is designed for selected Mersen fusible disconnect switches rated from 400 to 1200 A and is supplied as an individual shaft accessory for use with a compatible operating handle.
Key Advantages
- Purpose-designed operating shaft for Mersen UL 98 fusible disconnect switches.
- 12 × 12 mm square profile for positive mechanical engagement.
- 535 mm overall length for exceptionally deep electrical enclosures.
- Compatible with selected 400 to 1200 A disconnect switches.
- Enables external operation of an internally mounted switch-fuse.
- Heavy-duty construction for demanding industrial switchgear applications.
Key Features
- Mersen switch-fuse operating accessory.
- Square operating shaft.
- 12 × 12 mm shaft section.
- 535 mm overall shaft length.
- Designed for selected Mersen UL 98 fusible disconnect switches.
- Suitable for compatible disconnects rated from 400 to 1200 A.
- Connects an external operating handle to the internal switch mechanism.
- Supplied as an individual shaft accessory.
Reliable External Operation for Deep Switchgear Enclosures
The Mersen SFB535 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 panel during normal operation.
Its extended 535 mm length accommodates large switchboards, deep cabinets and flexible internal mounting positions. When combined with the correct Mersen switch and operating handle, the shaft helps create a reliable external operating arrangement for high-current power distribution equipment.
Typical Applications
- Deep industrial switchboards.
- UL 98 fusible disconnect switch assemblies.
- High-current power distribution systems.
- Motor control centres.
- OEM machinery and process equipment.
- Large panel-mounted electrical isolation systems.
