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MERSEN FUSE BASE MOD. CMS.14 3P+N CMS143N
Mersen CMS143N Modulostar modular fuse holder with three poles plus neutral for 14 × 51 mm IEC cylindrical fuse-links, rated 50 A and 690 V AC/DC with IP20 finger-safe protection.
£37.66
Why Choose the Mersen CMS143N Modulostar Fuse Holder?
The Mersen CMS143N, item number D331042, is a robust three-pole plus neutral modular fuse holder designed for safe and reliable protection of industrial electrical circuits. Part of the Mersen Modulostar® CMS14 series, it accepts 14 × 51 mm IEC cylindrical fuse-links and is suitable for protecting motors, transformers, low-voltage distribution systems and industrial control equipment operating at up to 690 V AC or 690 V DC.
Rated for a maximum current of 50 A, the CMS143N combines a compact modular design with finger-safe IP20 protection, including during fuse replacement. The four-module arrangement incorporates three protected phases plus a neutral pole, making it ideal for three-phase installations requiring neutral isolation.
Manufactured from durable flame-retardant insulating materials, the CMS143N mounts directly onto standard DIN rail systems and is engineered for long-term reliability in demanding industrial environments. The modular design also allows future expansion using Mersen field assembly kits where required.
Key Advantages
- Three-pole plus neutral 14 × 51 mm modular fuse holder.
- 50 A current rating for industrial power distribution.
- Suitable for systems operating at up to 690 V AC and 690 V DC.
- Finger-safe IP20 construction, including during fuse replacement.
- DIN rail mounting for quick installation.
- Compact modular design saves valuable panel space.
- Lockable and sealable in both open and closed positions.
- Compatible with optional field assembly accessories.
Key Features
- Mersen Modulostar® CMS14 series.
- Catalogue number: CMS143N.
- Manufacturer item number: D331042.
- 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.
- Finger-safe IP20 housing.
- DIN rail mounting.
- No visual blown-fuse indicator.
- Flame-retardant thermoplastic construction.
- RoHS and REACH compliant.
Reliable Protection for Three-Phase Installations
The CMS143N provides dependable protection for three-phase industrial electrical systems by accommodating 14 × 51 mm cylindrical fuse-links within a compact modular housing. Its integrated neutral pole makes it particularly suitable for applications where isolation of the neutral conductor is required alongside phase protection.
The finger-safe design improves operator safety while the DIN rail mounting system enables quick installation and straightforward maintenance. Its rugged construction makes the CMS143N suitable for industrial machinery, automation systems and low-voltage distribution equipment.
Typical Applications
- Industrial control panels.
- Three-phase motor protection.
- Transformer protection.
- Low-voltage distribution systems.
- Automation equipment.
- OEM machinery.
- Drive protection circuits.
- Industrial switchboards.
Technical Specifications
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| Fuse Indication | None | |
|---|---|---|
| Phase | Three Phase | |
| Device Type | Fuse base / holder | |
| Fuse Size | 14x51 mm | |
| Current | 50 A | |
| Voltage | 690 V | |
| Manufacturer | Mersen | |
| Series | Modulostar® CMS14 | |
| Item number | D331042 | |
| Catalogue number | CMS143N | |
| Product type | Modular fuse holder | |
| Configuration | 3-pole + neutral | |
| Fuse size | 14 × 51 mm | |
| Rated current | 50 A | |
| Rated voltage AC | 690 V IEC | |
| Rated voltage DC | 690 V IEC | |
| Protection rating | IP20 | |
| Short-circuit current rating | 100 kA (with suitable fuse-link) | |
| Mounting type | DIN rail | |
| Housing material | Flame-retardant thermoplastic | |
| Approximate weight | 0.56 kg | |
| EAN | 8430399000282 | |
| 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 CMS143N used for?
The CMS143N is a three-pole plus neutral modular fuse holder used to install 14 × 51 mm fuse-links for protecting industrial electrical circuits.
Which fuse size does the CMS143N accept?
The fuse holder is designed for standard 14 × 51 mm IEC cylindrical fuse-links.
What are the electrical ratings?
The CMS143N has a maximum current rating of 50 A and is suitable for systems operating at up to 690 V AC or 690 V DC.
Does the CMS143N include a blown-fuse indicator?
No. The CMS143N is the standard non-indicating version. Versions with visual indication and microswitches are available separately within the CMS14 range.
How is the fuse holder installed?
The CMS143N mounts directly onto a standard DIN rail, providing quick installation within industrial electrical panels.
Trusted Industrial Circuit Protection
Mersen Modulostar® CMS14 fuse holders are trusted worldwide by panel builders, OEM manufacturers and electrical engineers for safe, compact and dependable protection of industrial electrical systems.
