Why Choose the Mersen R331169 UltraSafe™ US223 Fuse Holder?
The Mersen R331169, catalogue number US223, is a robust three-pole modular fuse holder designed for 22 × 58 mm cylindrical fuse links. Part of the advanced Mersen UltraSafe™ US22 series, it delivers dependable overcurrent protection and safe circuit isolation for industrial power distribution, motor control and OEM machinery.
The US223 features a finger-safe IP20 enclosure, including during fuse replacement, helping protect maintenance personnel from accidental contact with live components. Manufactured from durable flame-retardant thermoplastic materials, it is ideal for industrial control panels, switchboards and demanding automation applications.
Rated at 125 A, the R331169 supports applications up to 800 V AC and 1000 V DC (UL) and 690 V AC (IEC). Its pressure-plate terminals and DIN rail mounting ensure secure installation, while the modular design allows optional field assembly with additional poles where required.
Key Advantages
- Reliable three-pole modular fuse holder.
- Designed for 22 × 58 mm cylindrical fuse links.
- 125 A thermal current rating.
- Suitable for 800 V AC and 1000 V DC UL applications.
- 690 V AC IEC rated.
- Finger-safe IP20 protection, including during fuse replacement.
- 100 kA short-circuit current rating when used with suitable fuse links.
- DIN rail mounting for straightforward installation.
Key Features
- Mersen UltraSafe™ US22 series.
- US223 catalogue designation.
- Three-pole configuration.
- Compatible with 22 × 58 mm cylindrical fuse links.
- 125 A rated current.
- 800 V AC / 1000 V DC UL ratings.
- 690 V AC IEC rating.
- Pressure-plate terminals.
- Finger-safe IP20 enclosure.
- DIN rail mounting.
Reliable Three-Phase Protection for Industrial Power Systems
The Mersen R331169 securely accommodates three 22 × 58 mm cylindrical fuse links, providing dependable protection against overloads and short circuits when used with correctly selected fuse links. Its robust construction and finger-safe design make it suitable for demanding industrial environments where reliability is essential.
The UltraSafe™ US22 range is designed to simplify installation and maintenance while providing excellent operator protection. Optional visual indicators and auxiliary microswitches are available elsewhere within the US22 family for applications requiring local or remote fuse monitoring.
Typical Applications
- Industrial control panels.
- Three-phase power distribution.
- Motor control centres.
- Variable speed drive protection.
- Transformer protection.
- OEM machinery.
- Automation systems.
- Electrical switchboards.
