MERSEN FUSE BASE MOD. CMS.22 1P+N C/I CMS221NI

Why Choose the Mersen CMS221NI Modulostar® Fuse Holder?

The Mersen CMS221NI is a robust 1-pole plus neutral cylindrical fuse holder with visual indication, designed for dependable circuit protection in industrial control panels, machinery and low-voltage power distribution systems. As part of the established Mersen Modulostar® CMS22 series, it accommodates 22 × 58 mm cylindrical fuse links and provides coordinated phase and neutral isolation within one modular assembly.

Rated at 125 A and suitable for operating voltages up to 690 V AC and 690 V DC, the CMS221NI is designed for demanding industrial applications. Its integrated visual fuse indicator allows maintenance personnel to identify an operated fuse quickly, reducing fault-finding time and helping minimise equipment downtime.

The CMS221NI features IP20 finger-safe protection, including during fuse replacement, helping reduce accidental contact with live components. Its durable housing, high-capacity terminals and DIN rail mounting arrangement make it an efficient solution for electrical panel builders, OEM manufacturers and industrial maintenance engineers.

Key Advantages

• Designed for 22 × 58 mm cylindrical fuse links.
• 1-pole plus neutral configuration for phase and neutral circuit isolation.
• High 125 A current rating for demanding industrial applications.
• Suitable for systems up to 690 V AC and 690 V DC.
• Integrated visual fuse indicator simplifies fault identification.
• IP20 finger-safe construction improves operator protection.
• DIN rail mounting enables straightforward control panel installation.

Key Features

• Mersen Modulostar® CMS22 series.
• Single-pole plus neutral conductor design.
• Compatible with 22 × 58 mm cylindrical fuse links.
• 125 A rated current.
• 690 V AC / 690 V DC IEC voltage rating.
• Integrated visual fuse-status indication.
• 100 kA short-circuit current rating.
• IP20 finger-safe protection.
• DIN rail mounting to EN 60715.
• RoHS-compliant construction.

Phase and Neutral Protection with Visual Fuse Indication

The Mersen CMS221NI 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 supports coordinated phase and neutral isolation for circuits where both conductors must be disconnected during maintenance.

Its integrated visual indicator helps engineers identify fuse operation directly at the control panel. Combined with finger-safe construction and robust DIN rail mounting, the CMS221NI supports safer maintenance, efficient fault diagnosis and reliable circuit protection in demanding industrial environments.

Typical Applications

• Industrial control and distribution panels.
• Single-phase machinery and automation systems.
• Phase and neutral circuit isolation.
• Motor and transformer control circuits.
• Power distribution equipment.
• Renewable energy installations.
• OEM electrical assemblies.
• Commercial and industrial switchgear.