Why Choose the Mersen M400D30S Side-Operated Fused Switch Disconnector?
The Mersen M400D30S is a heavy-duty IEC fused switch disconnector designed to provide dependable circuit switching, electrical isolation and fuse-based overcurrent protection in industrial low-voltage installations. Rated at 400 A, it is suitable for demanding power distribution applications where robust performance and safe maintenance isolation are required.
This model features a right-side-operated configuration, allowing the operating mechanism and external handle arrangement to be positioned at the side of the switch assembly. This makes the M400D30S particularly suitable for switchboards and control panels where front access, enclosure layout or internal component positioning requires a side-operated solution.
The Mersen M400D30S accommodates DIN fuse sizes 0-2 and uses a three-pole arrangement for three-phase electrical systems. By combining load switching, positive isolation and fuse protection within one assembly, it helps panel builders and electrical engineers create compact, dependable and serviceable distribution equipment.
Key Advantages
- Combines switching, isolation and fuse protection in one assembly.
- 400 A rated current for demanding industrial installations.
- Right-side-operated design for flexible panel layouts.
- Accepts DIN fuse sizes 0-2.
- Three-pole configuration suitable for three-phase circuits.
- Robust construction for switchboards and power distribution equipment.
Key Features
- Mersen IEC fused disconnect switch range.
- 400 A rated operational current.
- Three-pole fused switching arrangement.
- Right-side-operated mechanism.
- Designed for DIN fuse sizes 0-2.
- Manual load switching and secure circuit isolation.
- Suitable for industrial low-voltage distribution systems.
- Optional fourth fusible pole available for compatible M400D assemblies.
Flexible Side-Operated Circuit Isolation
Side-operated fused disconnect switches allow the switching mechanism to be accessed from the side of an enclosure or switchboard arrangement. This configuration can simplify mechanical design where a conventional front-operated switch would conflict with busbars, cable routes or other panel components.
The Mersen M400D30S also provides space for suitable DIN fuse links, enabling the switch to protect cables and connected equipment against excessive current. Its three-pole design simultaneously switches all three phases, helping create a clear and dependable isolation point during inspection, maintenance or equipment replacement.
Typical Applications
- Industrial low-voltage switchboards.
- Power distribution panels.
- Motor control centres.
- Manufacturing and process equipment.
- OEM electrical control assemblies.
- Commercial and infrastructure power systems.
