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.
£75.32
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.
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.
| 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 |
The L331164 is a two-pole modular fuse holder designed for 22 × 58 mm cylindrical fuse links used in industrial electrical protection applications.
It accepts standard 22 × 58 mm cylindrical fuse links with ratings up to 125 A.
Yes. The US222I incorporates an integrated visual blown-fuse indicator for rapid local identification of an operated fuse.
The US222I is rated up to 690 V AC under IEC standards and 800 V AC or 1000 V DC under UL standards.
The fuse holder mounts onto a standard DIN rail and uses pressure-plate terminals to provide secure electrical conductor connections.
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.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...