Mersen K331163 US222 UltraSafe two-pole modular fuse holder for 22 x 58 mm cylindrical fuse links, rated up to 125 A with pressure-plate terminals and IP20 finger-safe protection.
£44.57
The Mersen K331163, also identified by the catalogue reference US222, is a robust two-pole modular fuse holder designed for 22 × 58 mm cylindrical fuse links. Part of the dependable Mersen UltraSafe™ US22 series, it provides secure and convenient fuse protection for industrial control panels, electrical distribution systems and machinery.
The K331163 features a finger-safe modular enclosure with an IP20 protection rating, helping reduce accidental contact with live components during normal operation and fuse replacement. Its compact DIN rail mounted format allows panel builders and electrical engineers to create organised, space-efficient protection assemblies.
Suitable for fuse links rated up to 125 A, the US222 supports operating voltages up to 690 V AC under IEC standards and carries UL voltage ratings up to 800 V AC and 1000 V DC. Pressure-plate terminals provide reliable conductor clamping for demanding industrial installations.
The Mersen K331163 provides a secure method of installing 22 × 58 mm cylindrical fuse links within industrial switchboards, control panels and power distribution equipment. Its two-pole design enables two conductors or phases to be protected within one compact modular assembly.
By combining high current capacity, finger-safe construction and secure pressure-plate terminals, the US222 supports dependable operation in demanding installations. The fuse holder also allows straightforward fuse replacement, helping maintenance teams restore protected equipment efficiently following an overcurrent or short-circuit fault.
| Manufacturer | Mersen |
|---|---|
| Series | UltraSafe™ US22 |
| Catalogue reference | US222 |
| Item number | K331163 |
| Product type | Modular cylindrical fuse holder |
| Number of poles | 2 |
| Fuse size | 22 × 58 mm |
| Maximum fuse rating | 125 A |
| Rated voltage, IEC | Up to 690 V AC |
| Rated voltage, UL | Up to 800 V AC / 1000 V DC |
| Frequency | 50 / 60 Hz |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Terminal type | Pressure plate |
| Fuse indication | Without visual blown-fuse indicator |
| Installation type | Modular panel installation |
| Compliance | UL and IEC fuse-holder requirements |
| HS Code | 85361090 |
| Country of Manufacture | Tunisia |
The K331163 is a two-pole modular fuse holder used to install 22 × 58 mm cylindrical fuse links in industrial AC and DC circuit protection systems.
It is designed for standard 22 × 58 mm cylindrical fuse links with ratings up to 125 A.
The fuse holder is rated up to 690 V AC under IEC standards and up to 800 V AC or 1000 V DC under UL ratings.
No. The standard US222 version is supplied without an integrated visual blown-fuse indicator.
The fuse holder mounts onto a standard DIN rail and uses pressure-plate terminals to create secure electrical conductor connections.
Mersen UltraSafe™ fuse holders are widely selected by electrical engineers, OEM manufacturers and panel builders for dependable fuse protection, finger-safe operation and efficient installation in industrial power 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...