Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE US222I US222I
Mersen L331164 US222I UltraSafe two-pole modular fuse holder for 22 x 58 mm cylindrical fuse links with visual blown-fuse indicator, rated 125 A and IP20 finger-safe protection.
£45.19
Why Choose the Mersen L331164 US222I UltraSafe Fuse Holder?
The Mersen L331164, catalogue reference US222I, is a high-performance two-pole modular fuse holder designed for 22 × 58 mm cylindrical fuse links. Part of the proven Mersen UltraSafe™ US22 series, it delivers dependable overcurrent protection for industrial control panels, switchboards, machinery and power distribution systems whilst incorporating an integrated visual blown-fuse indicator.
The US222I features IP20 finger-safe protection, including during fuse replacement, helping improve operator safety and minimise accidental contact with live components. Its compact DIN rail mounted design, pressure-plate terminals and lockable modular construction make it ideal for OEM machinery, panel builders and industrial electrical installations.
Suitable for fuse links rated up to 125 A, the L331164 carries IEC ratings up to 690 V AC together with UL ratings of 800 V AC and 1000 V DC. The integrated visual fuse indicator allows maintenance engineers to quickly identify an operated fuse, reducing troubleshooting time and equipment downtime.
Key Advantages
- Two-pole UltraSafe™ modular fuse holder.
- Designed for 22 × 58 mm cylindrical fuse links.
- 125 A rated current.
- Integrated visual blown-fuse indicator.
- IP20 finger-safe protection, including during fuse replacement.
- DIN rail mounting for fast installation.
- Pressure-plate terminals provide secure conductor connections.
- Suitable for demanding industrial AC and DC applications.
Key Features
- Mersen UltraSafe™ US22 series.
- Catalogue number: US222I.
- Manufacturer item number: L331164.
- Two-pole configuration.
- Accepts 22 × 58 mm cylindrical fuse links.
- 125 A rated current.
- 690 V AC IEC rating.
- 800 V AC / 1000 V DC UL ratings.
- Integrated visual blown-fuse indicator.
- Pressure-plate terminals.
- DIN rail mounting.
- IP20 finger-safe enclosure.
Reliable Circuit Protection with Visual Fuse Indication
The Mersen L331164 provides dependable protection for industrial circuits using 22 × 58 mm cylindrical fuse links. Its two-pole configuration is ideal for protecting two conductors or phases within one compact modular assembly, helping optimise control panel layouts whilst maintaining excellent accessibility for maintenance personnel.
The integrated visual blown-fuse indicator enables rapid identification of an operated fuse without removing the fuse holder or carrying out extensive testing. Combined with its finger-safe design and robust construction, the US222I is an excellent choice for industrial automation, OEM machinery and electrical distribution systems.
Typical Applications
- Industrial control panels.
- Motor protection circuits.
- Transformer protection.
- Machine building.
- OEM automation systems.
- Electrical switchboards.
- Low voltage power distribution.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Visual indicator | |
|---|---|---|
| Poles | 2-pole | |
| Device Type | Fuse base / holder | |
| Fuse Type | Cylindrical | |
| Fuse Size | 22x58 mm | |
| Current | 125 A | |
| Voltage | 690 V | |
| Manufacturer | Mersen | |
| Series | UltraSafe™ US22 | |
| Model | US222I | |
| Item number | L331164 | |
| Product type | Modular cylindrical fuse holder | |
| Number of poles | 2 | |
| Fuse size | 22 × 58 mm | |
| Rated current | 125 A | |
| Rated voltage (IEC) | 690 V AC | |
| Rated voltage (UL) | 800 V AC / 1000 V DC | |
| Frequency | 50 / 60 Hz | |
| Short-circuit current rating | 100 kA | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Terminal type | Pressure plate | |
| Indication | Visual blown-fuse indicator | |
| Body material | Flame-retardant thermoplastic | |
| Dimensions (H × W × D) | approx. 126.5 × 70 × 96.5 mm | |
| Weight | approx. 0.325 kg | |
| Compliance | IEC, UL, CSA, RoHS and UKCA | |
| HS Code | 85361090 | |
| Country of Manufacture | Tunisia |
Frequently Asked Questions
What is the Mersen L331164 used for?
The L331164 is a two-pole modular fuse holder designed for 22 × 58 mm cylindrical fuse links used in industrial electrical protection applications.
What fuse size does the US222I accept?
It accepts standard 22 × 58 mm cylindrical fuse links with ratings up to 125 A.
Does the L331164 include a blown-fuse indicator?
Yes. The US222I incorporates an integrated visual blown-fuse indicator for rapid local identification of an operated fuse.
What voltage ratings does the fuse holder support?
The US222I is rated up to 690 V AC under IEC standards and 800 V AC or 1000 V DC under UL standards.
How is the Mersen L331164 installed?
The fuse holder mounts onto a standard DIN rail and uses pressure-plate terminals to provide secure electrical conductor connections.
Trusted by Industrial Panel Builders Worldwide
Mersen UltraSafe™ fuse holders are trusted by electrical engineers, OEM manufacturers and panel builders for dependable overcurrent protection, finger-safe operation and fast maintenance in industrial electrical systems.
