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MERSEN FUSE Switch.fus 800A 3 0+3 pos. M800D03
Mersen M800D03 800 A three-pole IEC fused switch disconnector for NH Size 3 fuse links, designed for industrial switching, electrical isolation and overcurrent protection.
£1,960.28
Why Choose the Mersen M800D03 Fused Switch Disconnector?
The Mersen M800D03 is a heavy-duty IEC fused switch disconnector engineered to provide dependable load switching, positive electrical isolation and fuse-based overcurrent protection within industrial low-voltage power distribution systems. Rated at 800 A, it is designed for demanding applications including main switchboards, motor control centres and high-capacity distribution panels.
Designed for use with NH Size 3 fuse links, the M800D03 combines manual switching, circuit isolation and fuse protection within a single assembly. This integrated design simplifies switchboard construction while providing reliable protection against overload and short-circuit faults in three-phase electrical installations.
Featuring a three-pole configuration with a front-operated mechanism, the M800D03 is suitable for industrial installations operating at up to 690 V AC. Its robust construction delivers dependable performance in demanding manufacturing, infrastructure and power distribution environments.
Key Advantages
- Combines switching, isolation and fuse protection in one assembly.
- 800 A rated current for high-capacity industrial installations.
- Designed for NH Size 3 fuse links.
- Three-pole configuration for three-phase systems.
- Provides a secure isolation point during servicing and maintenance.
- Heavy-duty construction for industrial switchboards and distribution equipment.
Key Features
- Mersen IEC fused switch disconnector.
- 800 A rated operational current.
- 690 V AC maximum operating voltage.
- Three-pole fused switching arrangement.
- Compatible with NH Size 3 fuse links.
- Manual load switching and secure electrical isolation.
- Fuse-based overload and short-circuit protection.
- Suitable for industrial panel and switchboard installation.
Reliable High-Current Switching and Protection
Fused switch disconnectors combine manual circuit isolation with the high fault-current protection provided by NH fuse links. This enables electrical equipment to be safely disconnected before maintenance while protecting cables and downstream equipment from overload and short-circuit conditions.
The Mersen M800D03 simultaneously switches all three phases, creating a clearly defined isolation point for high-current industrial equipment. Appropriate NH Size 3 fuse links should be selected to suit the installation's electrical characteristics and protection requirements.
Typical Applications
- Main low-voltage switchboards.
- Industrial power distribution systems.
- Motor control centres.
- Manufacturing and processing facilities.
- OEM electrical assemblies.
- Commercial and infrastructure power systems.
Technical Specifications
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| Current | 800 A | |
|---|---|---|
| Poles | 3-pole | |
| Device Type | Fuse switch disconnector | |
| Manufacturer | Mersen | |
| Model | M800D03 | |
| Product type | IEC fused switch disconnector | |
| Rated current | 800 A | |
| Rated operating voltage | Up to 690 V AC | |
| Number of poles | 3 | |
| Fuse size | NH Size 3 | |
| Operating mechanism | Front operated | |
| Primary function | Switching, isolation and overcurrent protection | |
| Application | Industrial low-voltage power distribution | |
| Mounting application | Panel / switchboard installation | |
| Applicable standard | IEC 60947-3 |
Frequently Asked Questions
What is the Mersen M800D03 used for?
The M800D03 is used to switch, isolate and provide fuse protection for high-current three-phase circuits in industrial low-voltage power distribution systems.
What is the current rating of the M800D03?
The Mersen M800D03 has a rated operational current of 800 A.
Which fuse size is compatible with the M800D03?
The switch is designed for NH Size 3 fuse links, allowing suitable fuse ratings to be selected according to the installation requirements.
Is the M800D03 a fused switch?
Yes. The M800D03 is a fused switch disconnector that combines manual circuit isolation with fuse-based overload and short-circuit protection.
How many poles does the M800D03 have?
The switch has a three-pole configuration for simultaneous switching, isolation and protection of three-phase electrical circuits.
Trusted by Electrical Professionals Worldwide
Mersen fused switch disconnectors are trusted by panel builders, OEMs and industrial electrical engineers for dependable high-current switching, secure electrical isolation and reliable fuse protection in demanding power distribution applications.
