Why Choose the Mersen M400D03 Fused Switch Disconnector?
The Mersen M400D03 is a heavy-duty fused switch disconnector designed to provide dependable switching, circuit isolation and fuse-based protection within industrial low-voltage electrical systems. With a rated current of 400 A, it is suitable for power distribution applications requiring robust performance and a secure means of disconnecting equipment from the electrical supply.
Combining switching and fuse protection within a single assembly, the M400D03 helps simplify the design of industrial switchboards and control panels. The switch enables circuits to be manually isolated for inspection or maintenance, while compatible fuse links provide protection against overloads and short circuits.
The Mersen M400D03 features a three-pole configuration for three-phase electrical systems and an operating arrangement identified as 0-2 / 0+3 positions. Its durable construction makes it suitable for panel builders, OEMs and electrical engineers working with industrial distribution equipment, motor circuits and machinery installations.
Key Advantages
- Combines electrical isolation and fuse protection in one assembly.
- 400 A rated current for demanding industrial applications.
- Three-pole configuration suitable for three-phase circuits.
- Provides a secure isolation point for servicing and maintenance.
- Helps protect downstream equipment against overcurrent and short-circuit faults.
- Robust design for installation in switchboards and control panels.
Key Features
- Mersen fused switch disconnector.
- 400 A rated operational current.
- Three-pole switching arrangement.
- 0-2 / 0+3 operating positions.
- Integrated provision for fuse-based circuit protection.
- Manual load switching and electrical isolation.
- Designed for industrial low-voltage distribution systems.
- Suitable for panel and switchboard mounting.
Reliable Switching and Fuse Protection
Fused switch disconnectors combine the functions of a manually operated isolating switch with the protection provided by electrical fuse links. This arrangement allows an installer or maintenance engineer to disconnect the circuit while also protecting cables and connected equipment against excessive current.
The Mersen M400D03 is designed for applications where dependable isolation and high-performance overcurrent protection are required. Its three-pole design enables simultaneous switching of the conductors in a three-phase circuit, helping support safe and efficient maintenance procedures.
Typical Applications
- Industrial low-voltage switchboards.
- Power distribution panels.
- Motor control centres and motor circuits.
- Manufacturing and process machinery.
- Commercial electrical distribution systems.
- OEM control panels and electrical assemblies.
