Why Choose the Mersen K331163 US222 UltraSafe Fuse Holder?
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.
Key Advantages
- Two-pole UltraSafe™ modular fuse holder for industrial circuit protection.
- Designed for standard 22 × 58 mm cylindrical fuse links.
- Suitable for fuse ratings up to 125 A.
- IP20 finger-safe construction improves operator protection.
- Supports high-voltage AC and DC electrical systems.
- DIN rail mounting simplifies panel installation.
- Pressure-plate terminals provide secure conductor connections.
- Compact modular design helps optimise control panel space.
Key Features
- Mersen UltraSafe™ US22 series.
- Catalogue reference: US222.
- Manufacturer item number: K331163.
- Two-pole configuration.
- Accepts 22 × 58 mm cylindrical fuse links.
- 125 A maximum fuse rating.
- IEC voltage rating up to 690 V AC.
- UL voltage ratings up to 800 V AC and 1000 V DC.
- Finger-safe IP20 enclosure.
- Pressure-plate terminal connection.
- DIN rail mounted modular construction.
- Suitable for industrial AC and DC circuit protection.
Reliable Protection for High-Current Electrical Circuits
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.
Typical Applications
- Industrial control panels.
- Electrical distribution boards.
- Motor and transformer protection circuits.
- Power conversion equipment.
- OEM machinery and automation systems.
- Renewable energy installations.
- Commercial and industrial switchboards.
