Why Choose the Mersen CMS221NM Modulostar® Fuse Holder?
The Mersen CMS221NM is a high-performance 1-pole plus neutral cylindrical fuse holder with integrated microswitch, designed to provide dependable circuit protection and remote fuse-status monitoring in industrial control panels, machinery and low-voltage power distribution systems. As part of the proven Mersen Modulostar® CMS22 series, it accommodates 22 × 58 mm cylindrical fuse links while combining phase and neutral isolation within a compact modular design.
Rated at 125 A with operational voltages up to 690 V AC and 690 V DC, the CMS221NM is suitable for demanding industrial applications. Its integrated microswitch enables remote signalling to PLCs, alarm systems or maintenance monitoring equipment, allowing faster fault identification and reducing equipment downtime.
Featuring IP20 finger-safe protection, a durable thermoplastic housing and DIN rail mounting, the CMS221NM provides a safe, reliable and efficient solution for OEM machine builders, electrical panel manufacturers and industrial maintenance engineers.
Key Advantages
- Designed for 22 × 58 mm cylindrical fuse links.
- 1-pole plus neutral configuration for coordinated phase and neutral isolation.
- High 125 A current rating.
- Suitable for systems up to 690 V AC and 690 V DC.
- Integrated microswitch for remote fuse-status monitoring.
- IP20 finger-safe construction enhances operator safety.
- DIN rail mounting enables quick and straightforward installation.
Key Features
- Mersen Modulostar® CMS22 series.
- 1-pole plus neutral configuration.
- Compatible with 22 × 58 mm cylindrical fuse links.
- 125 A rated current.
- 690 V AC / 690 V DC IEC rated voltage.
- Integrated microswitch for remote indication.
- 100 kA short-circuit current rating.
- IP20 finger-safe protection.
- DIN rail mounting.
- RoHS compliant construction.
Reliable Circuit Protection with Remote Monitoring
The Mersen CMS221NM provides a secure mounting and connection point for a 22 × 58 mm cylindrical fuse link while incorporating a neutral conductor within the same modular device. This configuration allows coordinated isolation of phase and neutral conductors for safer maintenance and improved electrical protection.
Its integrated microswitch enables remote monitoring of fuse holder operation, allowing maintenance personnel or automation systems to receive a status signal when the fuse holder changes state. This supports faster diagnostics, reduced downtime and improved maintenance planning within industrial installations.
Typical Applications
- Industrial control panels.
- Single-phase machinery and automation systems.
- Power distribution equipment.
- Motor control circuits.
- Transformer protection.
- OEM electrical assemblies.
- Industrial monitoring systems.
- Commercial and industrial switchgear.
