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MERSEN FUSE US221NM US221NM

MERSEN FUSE US221NM US221NM

Mersen J331162 UltraSafe US221NM modular fuse holder for 22 × 58 mm cylindrical fuse-links with 1 pole plus neutral configuration, auxiliary microswitch, 125 A rating and IP20 finger-safe protection.

SKU: J331162Alt SKU: US221NMMPN: J331162
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List Price £53.89 ex VAT
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Why Choose the Mersen J331162 UltraSafe™ US221NM Fuse Holder?

The Mersen J331162, catalogue number US221NM, is a premium 1-pole plus neutral modular fuse holder designed for industrial power distribution, machinery and electrical control systems. Part of the advanced Mersen UltraSafe™ US22 range, it accommodates standard 22 × 58 mm cylindrical fuse-links and incorporates an auxiliary microswitch for dependable remote fuse-status indication.

The UltraSafe™ design provides IP20 finger-safe protection, including during fuse replacement, while pressure-plate terminals ensure secure electrical connections. Manufactured from robust thermoplastic materials, the US221NM offers long-term reliability in demanding industrial environments and is easily installed on a standard DIN rail.

Rated at 125 A, with 800 V AC and 1000 V DC UL ratings, together with 690 V AC/DC IEC ratings, the J331162 is ideal for motor control, power conversion, industrial automation and renewable energy applications where remote fuse monitoring is required.

Key Advantages

  • Designed for 22 × 58 mm cylindrical fuse-links.
  • 1-pole plus neutral configuration for single-phase installations.
  • Integrated auxiliary microswitch for remote fuse-status indication.
  • 125 A current rating.
  • Suitable for systems up to 800 V AC and 1000 V DC.
  • IP20 finger-safe protection for improved operator safety.
  • Compact DIN rail mounting simplifies installation.

Key Features

  • Mersen UltraSafe™ US22 series.
  • Catalogue number: US221NM.
  • Manufacturer part number: J331162.
  • 1-pole plus neutral modular fuse holder.
  • Compatible with 22 × 58 mm cylindrical fuse-links.
  • 125 A conventional free-air thermal current.
  • 800 V AC / 1000 V DC UL ratings.
  • 690 V AC / DC IEC ratings.
  • Integrated auxiliary microswitch.
  • Pressure-plate terminal connections.
  • DIN rail mounting.
  • IP20 finger-safe construction.
  • Polyamide housing.

Reliable Circuit Protection with Remote Monitoring

The Mersen J331162 securely accommodates a 22 × 58 mm cylindrical fuse-link while providing an integrated neutral conductor and auxiliary microswitch. When the associated fuse operates, the microswitch can transmit a signal to PLCs, SCADA systems or alarm circuits, helping maintenance personnel identify faults quickly and minimise equipment downtime.

Its combination of high AC and DC voltage capability, compact modular construction and finger-safe design makes the US221NM suitable for demanding industrial applications where dependable overcurrent protection and remote diagnostics are essential.

Typical Applications

  • Industrial control panels.
  • Power distribution systems.
  • Variable speed drives.
  • Motor control equipment.
  • Industrial automation systems.
  • PLC monitoring circuits.
  • Renewable energy installations.
  • OEM machinery.

Technical Specifications

Phase Single Phase
Manufacturer Mersen
Series UltraSafe™ US22
Catalogue number US221NM
Manufacturer part number J331162
Product type Modular cylindrical fuse holder
Fuse size 22 × 58 mm
Configuration 1 Pole + Neutral (1P+N)
Rated current 125 A
Rated voltage AC (UL) 800 V
Rated voltage DC (UL) 1000 V
Rated voltage AC/DC (IEC) 690 V
Frequency 50 / 60 Hz
Short-circuit current rating 200 kA
Auxiliary contacts Integrated microswitch
Connection type Pressure plate terminals
Protection rating IP20
Mounting type DIN rail
Housing material Polyamide
Product weight Approximately 0.47 kg
EAN 0782001311223
RoHS compliant Yes
HS Code 85361090
Country of Manufacture Tunisia
Device Type Fuse base / holder
Fuse Type Cylindrical
Fuse Size 22x58 mm
Current 125 A
Voltage 800 V

Frequently Asked Questions

What fuse size does the Mersen J331162 accept?

The J331162 accepts standard 22 × 58 mm cylindrical fuse-links.

What does the integrated microswitch do?

The auxiliary microswitch provides remote fuse-status indication for PLCs, alarm systems and industrial monitoring equipment.

What are the electrical ratings of the US221NM?

The fuse holder is rated at 125 A, up to 800 V AC and 1000 V DC under UL ratings, with IEC ratings up to 690 V AC/DC.

Is the J331162 finger-safe?

Yes. The UltraSafe™ design provides IP20 finger-safe protection, including during fuse replacement.

How is the Mersen J331162 installed?

The fuse holder mounts directly onto a standard DIN rail inside electrical control panels, switchboards and industrial machinery.

Trusted by Industrial Electrical Professionals

Mersen UltraSafe™ fuse holders are trusted worldwide by panel builders, OEM manufacturers and industrial engineers for dependable circuit protection, remote fuse monitoring and long-term reliability in demanding electrical installations.

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