Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE SHAFT SWITCHFUSE 12X12X185MM SFB185
Mersen SFB185 switch-fuse operating shaft featuring a 12 x 12 mm square profile and 185 mm length for compatible UL 98 fusible disconnect switch assemblies.
£19.62
Why Choose the Mersen SFB185 Switch-Fuse Operating Shaft?
The Mersen SFB185 is a heavy-duty switch-fuse operating shaft designed for compatible Mersen UL 98 fusible disconnect switches. Featuring a robust 12 × 12 mm square profile and an overall length of 185 mm, it provides the mechanical connection between an enclosure-mounted operating handle and the disconnect switch mechanism installed inside the panel.
The SFB185 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 handle and switch mechanism, supporting reliable transfer of rotational movement during load switching and equipment isolation.
With its 185 mm shaft length, the SFB185 is suitable for industrial switchboards and deeper electrical enclosures where the switch mechanism is positioned away from the panel door. It is supplied as an individual shaft accessory and must be combined with the correct Mersen UL 98 fusible disconnect switch 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.
- 185 mm overall length for industrial enclosure installations.
- Enables external operation of an internally mounted switch-fuse mechanism.
- Supports safe circuit switching and equipment isolation.
- Heavy-duty construction suited to high-current switch assemblies.
Key Features
- Mersen switch-fuse operating accessory.
- Square operating shaft.
- 12 × 12 mm shaft section.
- 185 mm overall shaft length.
- Designed for selected Mersen UL 98 fusible disconnect switches.
- Suitable for compatible switch systems rated up to 600 V AC.
- Connects an external handle to the internal switching mechanism.
- Supplied as an individual shaft accessory.
Reliable External Operation for Fusible Disconnect Switches
The Mersen SFB185 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 distribution circuits to be switched or isolated without opening the panel during normal operation.
Its reinforced 12 × 12 mm profile is designed for the operating forces associated with larger switch-fuse assemblies. When installed with the appropriate Mersen handle and disconnect switch, the SFB185 helps create a dependable external operating system for demanding power distribution applications.
Typical Applications
- Industrial power distribution switchboards.
- UL 98 fusible disconnect switch assemblies.
- Motor control centres.
- Commercial and industrial service equipment.
- OEM machinery and process equipment.
- Panel-mounted electrical isolation systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Device Type | Fuse switch disconnector | |
|---|---|---|
| Manufacturer | Mersen | |
| Model | SFB185 | |
| Product type | Switch-fuse operating shaft | |
| Accessory type | Fusible disconnect switch shaft | |
| Shaft profile | Square | |
| Shaft dimensions | 12 × 12 mm | |
| Shaft length | 185 mm | |
| Compatible equipment | Selected Mersen UL 98 fusible disconnect switches | |
| Compatible system voltage | Up to 600 V AC | |
| Accessory function | Handle-to-switch mechanical connection | |
| Installation | Inside an electrical enclosure | |
| Supplied as | Shaft only |
Frequently Asked Questions
What is the Mersen SFB185 used for?
The SFB185 connects a compatible external operating handle to a Mersen UL 98 fusible disconnect switch installed inside an electrical enclosure.
What are the dimensions of the SFB185 shaft?
The shaft has a 12 × 12 mm square profile and an overall length of 185 mm.
Which disconnect switches are compatible with the SFB185?
The SFB185 is designed for selected Mersen UL 98 fusible disconnect switches. Compatibility should be confirmed against the exact switch and handle references before installation.
Is the SFB185 supplied with an operating handle?
No. The SFB185 is supplied as a shaft only. The compatible operating handle and fusible disconnect switch must be selected separately.
Why does the SFB185 use a 12 x 12 mm shaft?
The heavy-duty 12 × 12 mm square profile provides secure mechanical engagement and supports the operating forces required by compatible high-current fusible disconnect switches.
Trusted by Panel Builders Worldwide
Mersen switch-fuse accessories are used by panel builders, OEM manufacturers and electrical engineers to create dependable external operating and isolation systems for industrial power distribution equipment.
