Mersen M800D30S 800 A three-pole fused switch disconnector with right-side operation for industrial switching, electrical isolation and fuse-based circuit protection.
£2,881.77
The Mersen M800D30S is a heavy-duty fused switch disconnector designed to provide reliable load switching, secure electrical isolation and fuse-based circuit protection in demanding industrial low-voltage installations. With a rated current of 800 A, it is suitable for high-capacity feeders, switchboards and distribution systems requiring dependable operation and effective overcurrent protection.
This model features a right-side-operated mechanism, giving panel builders and electrical engineers greater flexibility when arranging busbars, cables and other components within large switchboards. The side-operated configuration is particularly useful where enclosure design or equipment positioning makes conventional front operation impractical.
The M800D30S uses a three-pole fused configuration for simultaneous switching, isolation and protection of three-phase electrical circuits. Its robust industrial construction makes it suitable for main distribution panels, motor control centres, manufacturing facilities and infrastructure applications where safe high-current isolation is essential.
Fused switch disconnectors combine a manually operated isolating switch with the protection provided by replaceable fuse links. This arrangement enables electrical equipment to be safely disconnected before inspection or maintenance while helping protect cables and downstream components against overload and short-circuit currents.
The Mersen M800D30S switches all three phases together and provides convenient right-side operation. Correctly rated fuse links should be selected according to the system voltage, load characteristics, conductor size and required protection performance.
| Current | 800 A |
|---|---|
| Manufacturer | Mersen |
| Model | M800D30S |
| Product type | Fused switch disconnector |
| Rated current | 800 A |
| Number of poles | 3 |
| Switch configuration | Three-pole fused switch |
| Operating mechanism | Right-side operated |
| Protection method | Fuse-based overcurrent protection |
| Primary function | Switching, isolation and circuit protection |
| Application | Industrial low-voltage power distribution |
| Mounting application | Panel / switchboard installation |
| Suitable system | Three-phase electrical circuits |
The M800D30S is used to switch, isolate and provide fuse-based protection for high-current three-phase circuits in industrial low-voltage power distribution systems.
The Mersen M800D30S has a rated operational current of 800 A.
The switch features a right-side-operated mechanism, making it suitable for switchboards and enclosures requiring side-mounted operation.
Yes. The M800D30S is a fused switch disconnector that combines manual circuit isolation with fuse-based overload and short-circuit protection.
The switch has a three-pole configuration for simultaneous switching, isolation and protection of three-phase electrical circuits.
Mersen fused switch disconnectors are trusted by panel builders, OEMs and industrial electrical engineers for dependable high-current switching, secure circuit isolation and reliable fuse protection in demanding power distribution applications.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...