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MERSEN FUSE US223I US223I

MERSEN FUSE US223I US223I

Mersen S331170 US223I UltraSafe three-pole modular fuse holder for 22 x 58 mm cylindrical fuse links with visual blown-fuse indication, IP20 protection and DIN rail mounting.

SKU: S331170Alt SKU: US223IMPN: S331170
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List Price £113.86 ex VAT
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£113.86
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Why Choose the Mersen S331170 US223I UltraSafe™ Fuse Holder?

The Mersen S331170, catalogue reference US223I, is a premium three-pole modular fuse holder designed to provide safe, dependable protection for industrial electrical installations. Part of the renowned Mersen UltraSafe™ US22 series, it accepts standard 22 × 58 mm cylindrical fuse links and combines high electrical performance with a compact DIN rail mounting design for modern control panels and switchboards.

The US223I features an integrated visual blown-fuse indicator, enabling maintenance personnel to quickly identify an operated fuse without removing the fuse holder. Its IP20 finger-safe construction allows safer fuse replacement while helping reduce maintenance time and improve equipment availability.

Rated for 125 A, with voltage ratings of 800 V AC UL, 1000 V DC UL and 690 V AC IEC, the Mersen S331170 is ideally suited to industrial machinery, motor control centres, power distribution systems and automation equipment requiring reliable cylindrical fuse protection.

Key Advantages

  • Three-pole UltraSafe™ modular fuse holder.
  • Designed for 22 × 58 mm cylindrical fuse links.
  • Integrated visual blown-fuse indicator.
  • High 125 A current rating.
  • Suitable for demanding AC and DC industrial applications.
  • IP20 finger-safe construction improves operator safety.

Key Features

  • Mersen UltraSafe™ US22 series.
  • Three-pole modular fuse holder.
  • Accepts 22 × 58 mm cylindrical fuse links.
  • 125 A conventional free-air thermal current.
  • 800 V AC UL rated voltage.
  • 1000 V DC UL rated voltage.
  • 690 V AC IEC rated voltage.
  • Integrated visual blown-fuse indication.
  • Pressure-plate terminals.
  • DIN rail mounting with IP20 protection.

Reliable Protection for Industrial Power Systems

The Mersen S331170 provides safe installation and dependable protection for 22 × 58 mm cylindrical fuse links within industrial electrical equipment. Its finger-safe design helps improve operator safety during maintenance whilst the integrated visual indicator allows blown fuses to be identified immediately.

Designed for panel builders, OEMs and industrial maintenance engineers, the US223I offers reliable protection for motors, transformers, low voltage distribution equipment and industrial automation systems where dependable fuse monitoring is essential.

Typical Applications

  • Industrial control panels.
  • Motor control centres.
  • Power distribution systems.
  • OEM machinery.
  • Automation control cabinets.
  • Electrical switchboards.

Technical Specifications

Phase Three Phase
Manufacturer Mersen
Series UltraSafe™ US22
Item number S331170
Catalogue number US223I
Product type Modular cylindrical fuse holder
Fuse size 22 × 58 mm
Number of poles 3
Rated current 125 A
Rated voltage AC (UL) 800 V
Rated voltage DC (UL) 1000 V
Rated voltage AC (IEC) 690 V
Frequency 50 / 60 Hz
Visual indicator Yes
Protection rating IP20
Terminal type Pressure plate
Mounting type DIN rail
EAN / UPC 0782001311445
HS Code 85361090
Country of Manufacture Tunisia
Poles 3-pole
Device Type Fuse base / holder
Fuse Type Cylindrical
Fuse Size 22x58 mm
Current 125 A
Voltage 800 V

Frequently Asked Questions

What is the Mersen S331170 used for?

The Mersen S331170 is a three-pole modular fuse holder designed to house and protect 22 × 58 mm cylindrical fuse links in industrial electrical systems.

Which fuse size does the US223I accept?

It is designed for standard 22 × 58 mm cylindrical fuse links.

Does this fuse holder include a blown-fuse indicator?

Yes. The US223I includes an integrated visual blown-fuse indicator for rapid fault identification.

What are the voltage and current ratings?

The fuse holder is rated for 125 A, 800 V AC UL, 1000 V DC UL and 690 V AC IEC.

Where is the Mersen S331170 typically installed?

It is commonly DIN rail mounted inside industrial control panels, switchboards and automation cabinets.

Trusted by Industrial Engineers Worldwide

Mersen UltraSafe™ fuse holders are trusted by OEMs, panel builders and electrical engineers worldwide for dependable cylindrical fuse protection, excellent operator safety and long-term reliability.

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