Why Choose the Mersen V331172 US223MI UltraSafe™ Fuse Holder?
The Mersen V331172, also identified by catalogue number US223MI, is a robust 3-pole UltraSafe™ cylindrical fuse holder designed for reliable overcurrent protection in industrial control panels, machinery and power distribution systems. It accepts 22 × 58 mm cylindrical fuse links and combines high electrical ratings with visual and remote fuse-status indication.
Rated at 125 A, the V331172 supports operating voltages up to 800 V AC and 1000 V DC under UL ratings, with IEC ratings of 690 V AC and 690 V DC. Its three-pole configuration makes it suitable for coordinated protection of three-phase circuits in demanding industrial installations.
The integrated visual indicator and microswitch system helps maintenance engineers identify operated fuses and transmit remote status signals to control or alarm equipment. Its pressure-plate terminals, DIN rail mounting and IP20 finger-safe construction support safe installation, dependable wiring and efficient servicing.
Key Advantages
- Designed for 22 × 58 mm cylindrical fuse links.
- 3-pole configuration for three-phase electrical systems.
- High 125 A maximum fuse rating.
- Supports up to 800 V AC and 1000 V DC under UL ratings.
- Integrated visual indication and microswitch for local and remote monitoring.
- IP20 finger-safe design improves operator protection.
- DIN rail mounting simplifies industrial panel installation.
Key Features
- Mersen UltraSafe™ US22 series.
- Three-pole modular fuse holder.
- Compatible with 22 × 58 mm fuse links.
- 125 A rated current.
- 800 V AC / 1000 V DC UL voltage ratings.
- 690 V AC / 690 V DC IEC voltage ratings.
- Integrated visual fuse-status indicator.
- Integrated microswitch for remote indication.
- Pressure-plate terminal design.
- IP20 finger-safe polyamide housing.
High-Voltage Protection with Remote Fuse Monitoring
The Mersen V331172 provides a secure mounting and connection point for three 22 × 58 mm cylindrical fuse links. When an overload or short circuit occurs, the installed fuse interrupts the affected pole according to its operating characteristics, helping protect cables, machinery and power distribution equipment.
Its combined visual indicator and microswitch system allows maintenance personnel to identify fuse operation locally while also sending a remote status signal to a PLC, alarm circuit or monitoring system. This can reduce fault-finding time and improve equipment availability in automated industrial installations.
Typical Applications
- Industrial control and distribution panels.
- Three-phase machinery and automation systems.
- Motor control centres.
- High-voltage AC and DC distribution circuits.
- Renewable energy and energy storage systems.
- Power conversion equipment.
- Transformer and feeder protection.
- OEM electrical assemblies.
