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.
