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MERSEN FUSE BASE MOD.CMS.14 C/MIC+IND 3P+N CMS143NMI
Mersen CMS143NMI Modulostar 14 × 51 mm cylindrical fuse holder with three poles plus neutral, 50 A rating, 690 V AC/DC operation, visual indication and auxiliary microswitch.
£67.81
Why Choose the Mersen CMS143NMI Modulostar® Fuse Holder?
The Mersen CMS143NMI is a robust modular 14 × 51 mm cylindrical fuse holder designed for dependable circuit protection in industrial control panels, machinery and low-voltage distribution systems. Part of the Mersen Modulostar® CMS14 range, it combines a three-pole fuse arrangement with a neutral conductor, providing a practical solution for three-phase electrical installations.
This model incorporates both a visual blown-fuse indicator and an auxiliary microswitch. The visual indicator helps maintenance personnel identify an operated fuse locally, while the microswitch supports remote status signalling to control systems, alarms or monitoring equipment. These features can help reduce troubleshooting time and minimise disruption following an electrical fault.
Rated for up to 50 A and 690 V AC or DC, the CMS143NMI accepts standard 14 × 51 mm IEC cylindrical fuse-links. Its IP20 finger-safe modular housing and DIN rail mounting arrangement make it well suited to compact industrial enclosures where safety, accessibility and reliable protection are essential.
Key Advantages
- Suitable for standard 14 × 51 mm cylindrical fuse-links.
- Three-pole plus neutral configuration for three-phase installations.
- Integrated visual blown-fuse indication supports rapid fault identification.
- Auxiliary microswitch enables remote fuse-status signalling.
- 50 A current rating for industrial circuit protection.
- Finger-safe IP20 construction, including during fuse replacement.
- Compact DIN rail design simplifies panel installation.
Key Features
- Mersen Modulostar® CMS14 series.
- 14 × 51 mm IEC cylindrical fuse-holder format.
- Three protected poles plus neutral conductor.
- 50 A rated current.
- 690 V AC and 690 V DC rated voltage.
- 100 kA short-circuit current rating.
- Integrated visual fuse-operation indicator.
- Auxiliary microswitch for remote indication.
- DIN rail mounting for modular control panels.
- IP20 finger-safe construction.
- Durable flame-retardant insulating housing.
- Suitable for rigid and stranded conductors.
Reliable Fuse Protection with Local and Remote Indication
The Mersen CMS143NMI securely houses cylindrical fuse-links that protect electrical equipment against overcurrents and short-circuit faults. When a compatible fuse operates, the integrated visual indicator provides a clear local indication, helping engineers locate the affected circuit quickly.
The auxiliary microswitch adds remote monitoring capability and can be incorporated into an alarm, PLC or supervisory control circuit. This makes the CMS143NMI particularly useful in automated installations where rapid fault notification and reduced machine downtime are important.
Typical Applications
- Three-phase industrial control panels.
- Motor and transformer protection circuits.
- Low-voltage distribution systems.
- Variable speed drive protection.
- OEM machinery and production equipment.
- Industrial automation systems.
- Marine and railway electrical installations.
- Remote fault-monitoring circuits.
Technical Specifications
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| Fuse Indication | Microswitch, Visual indicator | |
|---|---|---|
| Phase | Three Phase | |
| Device Type | Fuse base / holder | |
| Fuse Type | Cylindrical | |
| Fuse Size | 14x51 mm | |
| Current | 50 A | |
| Voltage | 690 V | |
| Manufacturer | Mersen | |
| Series | Modulostar® CMS14 | |
| Catalogue number | CMS143NMI | |
| Item number | H331000 | |
| Product type | Modular cylindrical fuse holder | |
| Fuse size | 14 × 51 mm | |
| Configuration | 3-pole + neutral | |
| Rated current | 50 A | |
| Rated voltage AC | 690 V | |
| Rated voltage DC | 690 V | |
| Rated insulation voltage | 690 V | |
| Rated impulse withstand voltage | 8 kV | |
| Short-circuit current rating | 100 kA | |
| Indication system | Visual indicator and auxiliary microswitch | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Terminal tightening torque | 3.5 N·m | |
| Rigid conductor capacity | 1.5–35 mm² | |
| Stranded conductor capacity | 1.5–25 mm² | |
| Electrical supply type | AC / DC | |
| RoHS compliant | Yes | |
| EAN | 8430399000305 | |
| HS Code | 85361050 | |
| Country of Manufacture | Tunisia |
Frequently Asked Questions
What fuse size does the Mersen CMS143NMI accept?
The CMS143NMI is designed for standard 14 × 51 mm IEC cylindrical fuse-links.
What does the 3-pole plus neutral configuration provide?
It provides three protected fuse poles together with a neutral conductor, making the holder suitable for three-phase electrical systems that require a neutral connection.
Does the CMS143NMI provide fuse-status indication?
Yes. It includes a visual blown-fuse indicator for local identification and an auxiliary microswitch that can provide remote status signalling.
What are the electrical ratings of this fuse holder?
The Mersen CMS143NMI is rated at 50 A and up to 690 V AC or 690 V DC, with a short-circuit current rating of 100 kA.
How is the Mersen CMS143NMI installed?
The fuse holder mounts onto a standard DIN rail inside an electrical control panel, switchboard or machinery enclosure.
Trusted by Industrial Electrical Professionals
Mersen Modulostar® fuse holders are widely specified by panel builders, machine manufacturers and electrical engineers for dependable circuit protection, finger-safe operation and efficient fault monitoring in demanding industrial systems.
