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MERSEN FUSE BASE MOD. CMS.14 3P+N C/MICRO CMS143NM
Mersen CMS143NM Modulostar modular fuse holder with three poles plus neutral, integrated auxiliary microswitch, 14 × 51 mm fuse support, 50 A rating and DIN rail mounting.
£53.48
Why Choose the Mersen CMS143NM Modulostar Fuse Holder?
The Mersen CMS143NM, manufacturer item number E331043, is a premium three-pole plus neutral modular fuse holder with auxiliary microswitch, designed for safe and reliable protection of industrial electrical systems. As part of the Mersen Modulostar® CMS14 series, it accepts 14 × 51 mm IEC cylindrical fuse-links and is ideal for protecting motors, transformers, automation equipment and low-voltage distribution systems operating at up to 690 V AC or 690 V DC.
Rated for fuse-links up to 50 A, the CMS143NM incorporates an integrated auxiliary microswitch for remote indication, allowing PLCs, alarm systems and building management systems to monitor fuse holder status. The additional neutral pole enables complete circuit isolation, while the finger-safe IP20 enclosure enhances operator safety during both operation and fuse replacement.
Designed for demanding industrial environments, the CMS143NM mounts directly onto standard DIN rails and features robust thermoplastic construction for excellent mechanical durability. The modular design simplifies installation and maintenance while supporting expansion using compatible Mersen accessories.
Key Advantages
- Three-pole plus neutral 14 × 51 mm modular fuse holder.
- 50 A maximum current rating.
- Suitable for systems operating up to 690 V AC and 690 V DC.
- Integrated auxiliary microswitch for remote indication.
- Finger-safe IP20 protection.
- DIN rail mounting for fast installation.
- Integrated neutral isolation.
- Designed for demanding industrial control applications.
Key Features
- Mersen Modulostar® CMS14 series.
- Catalogue number: CMS143NM.
- Manufacturer item number: E331043.
- Three-pole plus neutral configuration.
- Suitable for 14 × 51 mm IEC cylindrical fuse-links.
- 50 A rated current.
- 690 V AC / 690 V DC IEC rating.
- Integrated auxiliary microswitch.
- Finger-safe IP20 enclosure.
- DIN rail mounting.
- Flame-retardant thermoplastic housing.
- RoHS compliant.
Reliable Protection with Remote Monitoring
The CMS143NM combines dependable overcurrent protection with remote signalling capability, allowing maintenance engineers to monitor fuse holder status through PLCs or supervisory control systems. This helps reduce fault-finding time and improves overall system availability.
Its three-pole plus neutral configuration makes it suitable for industrial machinery, three-phase distribution systems and automation panels where safe isolation and remote monitoring are essential requirements.
Typical Applications
- Industrial control panels.
- Three-phase motor protection.
- Automation systems.
- OEM machinery.
- Transformer protection.
- Low-voltage distribution systems.
- Process control equipment.
- Industrial switchboards.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Microswitch | |
|---|---|---|
| Phase | Three Phase | |
| Device Type | Fuse base / holder | |
| Fuse Size | 14x51 mm | |
| Voltage | 690 V | |
| Manufacturer | Mersen | |
| Series | Modulostar® CMS14 | |
| Item number | E331043 | |
| Catalogue number | CMS143NM | |
| Product type | Modular fuse holder | |
| Configuration | 3-pole + neutral | |
| Fuse size | 14 × 51 mm | |
| Maximum fuse rating | 50 A | |
| Rated voltage | 690 V AC / 690 V DC | |
| Protection rating | IP20 | |
| Short-circuit current rating | 100 kA (with suitable fuse-link) | |
| Mounting type | DIN rail | |
| Auxiliary function | Integrated microswitch for remote indication | |
| Housing material | Flame-retardant thermoplastic | |
| Approximate weight | 0.61 kg | |
| Compliance | IEC 60269-2, IEC 60947-3, CE, RoHS and REACH | |
| HS Code | 85361050 | |
| Country of Manufacture | Tunisia |
Frequently Asked Questions
What is the Mersen CMS143NM used for?
The CMS143NM is a three-pole plus neutral modular fuse holder designed for 14 × 51 mm cylindrical fuse-links, providing industrial circuit protection with remote status indication.
Which fuse size is compatible with the CMS143NM?
The fuse holder accepts standard 14 × 51 mm IEC cylindrical fuse-links.
What is the maximum current rating?
The CMS143NM supports fuse-links rated up to 50 A and systems operating at up to 690 V AC or 690 V DC.
What does the auxiliary microswitch do?
The integrated auxiliary microswitch provides a remote electrical signal that can be connected to PLCs, alarms or monitoring systems to indicate the fuse holder's operating status.
How is the CMS143NM installed?
The fuse holder mounts directly onto a standard DIN rail for quick installation within industrial electrical panels and switchboards.
Trusted Industrial Circuit Protection
Mersen Modulostar® CMS14 fuse holders are trusted worldwide by machine builders, OEM manufacturers and electrical engineers for reliable overcurrent protection, safe operation and dependable industrial performance.
