Why Choose the Mersen CMS144 Modulostar Fuse Holder?
The Mersen CMS144, manufacturer item number F331021, is a robust four-pole modular fuse holder designed for use with 14 × 51 mm cylindrical fuse-links. Part of the Mersen Modulostar CMS14 series, it provides dependable overcurrent protection for industrial electrical distribution, machinery and automation systems.
The CMS144 accommodates four fuse-links within a compact modular assembly, making it suitable for three-phase circuits with a switched neutral or other applications requiring four-pole protection. Its IP20 finger-safe design helps prevent accidental contact with live components, including during fuse replacement when correctly installed.
With a rated current of 50 A, an operating voltage of up to 690 V AC or 690 V DC and a 100 kA short-circuit current rating, the CMS144 is suitable for demanding industrial circuits. DIN rail mounting allows straightforward installation within control panels, switchboards and electrical enclosures.
Key Advantages
- Compact four-pole fuse holder for 14 × 51 mm fuse-links.
- 50 A rated current for industrial electrical protection.
- Suitable for systems up to 690 V AC or 690 V DC.
- 100 kA short-circuit current rating for high fault-current applications.
- IP20 finger-safe construction supports safer operation and fuse replacement.
- DIN rail mounting simplifies control panel installation.
- Lockable and sealable design supports controlled access and maintenance.
Key Features
- Mersen Modulostar CMS14 series.
- CMS144 four-pole configuration.
- Compatible with 14 × 51 mm cylindrical fuse-links.
- Suitable for gG, aM and compatible Mersen Protistor fuse-links.
- 50 A conventional free-air thermal current.
- 690 V AC and 690 V DC rated voltage.
- 100 kA short-circuit current rating.
- 8 kV rated impulse withstand voltage.
- IP20 finger-safe modular construction.
- Flame-retardant thermoplastic or thermoset housing.
- DIN rail installation according to EN 60715.
Reliable Four-Pole Protection for Industrial Circuits
The Mersen CMS144 provides secure mounting and electrical connection for four cylindrical fuse-links. When installed with correctly selected 14 × 51 mm fuses, it helps protect cables, motors, transformers, drives and electrical equipment against damaging overload and short-circuit currents.
Its four-pole arrangement is particularly suitable for three-phase and neutral systems where all conductors require coordinated isolation. The modular, lockable design also supports safe maintenance and efficient integration into modern industrial control panels and distribution assemblies.
Typical Applications
- Three-phase and neutral electrical circuits.
- Industrial control panels and switchboards.
- Motor and transformer protection.
- Variable speed drive protection.
- Low-voltage power distribution systems.
- Machinery and OEM automation equipment.
- Railway and marine electrical installations.
- Commercial and industrial infrastructure.
