Mersen M400D30S 400 A three-pole IEC fused switch disconnector for DIN fuse sizes 0-2, featuring a right-side-operated mechanism for industrial power distribution systems.
£1,305.19
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.
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.
| Current | 400 A |
|---|---|
| Manufacturer | Mersen |
| Model | M400D30S |
| Reference number | Z1043279 |
| Product type | IEC fused switch disconnector |
| Rated current | 400 A |
| Number of poles | 3 |
| Fuse format | DIN fuse sizes 0-2 |
| Operation | Right-side operated |
| Switch configuration | Three-pole fused switch |
| Primary function | Switching, isolation and overcurrent protection |
| Mounting application | Panel / switchboard installation |
| Weight | Approx. 7.18 kg without packaging |
The M400D30S is used to switch, isolate and provide fuse protection for high-current three-phase circuits in industrial low-voltage distribution systems.
The Mersen M400D30S has a rated current of 400 A.
The switch is designed for DIN fuse sizes 0-2. Fuse links should be selected to match the circuit and installation requirements.
The M400D30S uses a right-side-operated mechanism, making it suitable for enclosures and switchboards requiring side access to the operating handle.
The switch has a three-pole configuration for simultaneous switching and isolation of three-phase electrical circuits.
Mersen fused switch disconnectors are trusted by panel builders, electrical engineers and industrial operators for dependable circuit protection, secure isolation and robust switching performance in demanding power distribution systems.
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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...