Why Choose the Mersen W331173 US223M2 UltraSafe Fuse Holder?
The Mersen W331173, also identified by catalogue number US223M2, is a robust three-pole modular fuse holder designed for dependable circuit protection in industrial electrical distribution, machinery and power conversion systems. As part of the Mersen UltraSafe™ US22 series, it accepts cylindrical 22 × 58 mm fuse-links and provides a finger-safe design with an IP20 protection rating.
This fuse holder is suitable for both AC and DC applications, with voltage ratings of up to 800 V AC under UL and 1000 V DC under UL. It supports fuse ratings up to 125 A and provides a short-circuit current rating of 100 kA, making it suitable for demanding installations where reliable overcurrent protection is essential.
The W331173 incorporates two microswitches for remote fuse-status indication and monitoring. Its pressure-plate connection system, durable polyamide housing and DIN rail mounting arrangement simplify installation within electrical control panels, switchboards and industrial enclosures.
Key Advantages
- Three-pole UltraSafe™ modular fuse holder for industrial circuit protection.
- Compatible with standard 22 × 58 mm cylindrical fuse-links.
- Includes two microswitches for remote status indication.
- Supports rated currents up to 125 A.
- High 100 kA short-circuit current rating.
- Finger-safe IP20 construction helps improve operator protection.
- Suitable for both AC and DC electrical systems.
- DIN rail mounting enables straightforward control-panel installation.
Key Features
- Mersen UltraSafe™ US22 series.
- Three-pole fuse holder.
- 22 × 58 mm fuse size.
- 125 A maximum fuse rating.
- 800 V AC UL rated voltage.
- 1000 V DC UL rated voltage.
- Two integrated microswitches for fuse-status signalling.
- Pressure-plate terminal arrangement.
- Clip-in fuse installation for convenient maintenance.
- Tough polyamide insulating housing.
- DIN rail mounting in accordance with EN 60715.
Reliable Fuse Protection and Remote Monitoring
Modular fuse holders provide a secure mounting and connection point for replaceable fuse-links within electrical distribution and control systems. When excessive current or a short circuit occurs, the installed fuse-link interrupts the circuit to help protect cables, machinery and connected electrical equipment.
The Mersen W331173 combines high voltage and current ratings with a finger-safe enclosure and remote microswitch signalling. The two microswitches can be incorporated into monitoring or control circuits to provide remote indication of fuse-holder status, supporting faster fault identification and reduced equipment downtime.
Typical Applications
- Industrial electrical control panels.
- Low-voltage power distribution systems.
- Machinery and production equipment.
- Power conversion and semiconductor protection systems.
- Motor control centres and switchboards.
- Renewable energy and energy storage installations.
- Automation and process-control equipment.
- AC and DC circuit-protection applications.
