Wöhner 33718 QUADRON 185Power single-pole NH 3 fuse switch-disconnector rated at 630 A for industrial 185 mm busbar systems.
£255.21
The Wöhner 33718 is a heavy-duty 630 A NH fuse switch-disconnector designed to provide safe switching, dependable isolation and reliable overcurrent protection within industrial low-voltage power distribution systems. Part of the Wöhner QUADRON® 185Power range, this single-pole switchable device is ideal for applications requiring individual phase isolation while maintaining the proven protection of NH fuse technology.
Designed for installation on 185 mm busbar systems, the Wöhner 33718 mounts directly onto drilled busbars measuring 30, 40, 60, 80, 100 or 120 × 10 mm. Durable M12 screw terminals ensure secure cable connections, while the lockable cover and self-closing inspection holes improve operator safety and simplify maintenance. The unit also supports the integration of current transformers for energy monitoring applications.
Compatible with NH 3 fuse links manufactured to IEC / HD 60269-2, the 33718 is suitable for industrial switchboards, motor control centres, OEM machinery and main distribution panels. As part of the modular QUADRON® 185Power platform, it integrates seamlessly with other Wöhner switching and protection devices.
The Wöhner 33718 combines manual switching with NH fuse protection, providing reliable isolation and protection against overloads and short circuits. The single-pole switching design enables individual phase isolation, making maintenance and selective circuit control simpler without interrupting the complete installation.
As part of the modular QUADRON® 185Power system, the device can be combined with fuse blocks, MCCB adapters, switch disconnectors and monitoring accessories on the same 185 mm busbar platform, allowing highly flexible and scalable panel designs.
| Current | 630 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | Wöhner |
| Series | QUADRON® 185Power |
| Model | 33718 |
| Alternative part number | 33718000A |
| Product type | NH fuse switch-disconnector |
| Rated current | 630 A |
| Rated operational voltage | 690 V AC |
| Rated insulation voltage | 1000 V AC |
| Rated impulse withstand voltage | 8 kV |
| Fuse size | NH 3 |
| Number of poles | 1 (single-pole switchable) |
| Connection type | M12 screw terminals |
| Compatible busbars | 30, 40, 60, 80, 100 or 120 × 10 mm |
| Busbar system | 185Power |
| Short-circuit strength | Up to 100 kA when protected by fuses |
| Maximum fuse power dissipation | 48 W |
| Current transformer integration | Yes |
| Protection rating | IP20 (front), IP10 when open |
| Dimensions (W × H × D) | 100 × 670 × 189 mm |
| Operating temperature | -40°C to +55°C |
| Connection | M12 screw terminals |
| Halogen-free | Yes |
| Approvals | IEC (CB), CCC |
| Pack quantity | 1 |
| EAN | 4021267337186 |
The Wöhner 33718 is a single-pole NH fuse switch-disconnector designed for switching, isolation and overcurrent protection in industrial power distribution systems.
The device accepts NH 3 fuse links manufactured in accordance with IEC / HD 60269-2.
The Wöhner 33718 has a rated current of 630 A.
Yes. The design supports integration of current transformers for energy measurement and monitoring applications.
Yes. The cover can be locked in the closed position to help prevent unauthorised operation and improve operator safety.
Wöhner QUADRON® 185Power fuse switch-disconnectors are trusted by panel builders, OEMs and industrial electrical engineers for dependable high-current protection, safe isolation and modular integration into demanding power distribution systems.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...