Mersen S331170 US223I UltraSafe three-pole modular fuse holder for 22 x 58 mm cylindrical fuse links with visual blown-fuse indication, IP20 protection and DIN rail mounting.
£113.86
The Mersen S331170, catalogue reference US223I, is a premium three-pole modular fuse holder designed to provide safe, dependable protection for industrial electrical installations. Part of the renowned Mersen UltraSafe™ US22 series, it accepts standard 22 × 58 mm cylindrical fuse links and combines high electrical performance with a compact DIN rail mounting design for modern control panels and switchboards.
The US223I features an integrated visual blown-fuse indicator, enabling maintenance personnel to quickly identify an operated fuse without removing the fuse holder. Its IP20 finger-safe construction allows safer fuse replacement while helping reduce maintenance time and improve equipment availability.
Rated for 125 A, with voltage ratings of 800 V AC UL, 1000 V DC UL and 690 V AC IEC, the Mersen S331170 is ideally suited to industrial machinery, motor control centres, power distribution systems and automation equipment requiring reliable cylindrical fuse protection.
The Mersen S331170 provides safe installation and dependable protection for 22 × 58 mm cylindrical fuse links within industrial electrical equipment. Its finger-safe design helps improve operator safety during maintenance whilst the integrated visual indicator allows blown fuses to be identified immediately.
Designed for panel builders, OEMs and industrial maintenance engineers, the US223I offers reliable protection for motors, transformers, low voltage distribution equipment and industrial automation systems where dependable fuse monitoring is essential.
| Phase | Three Phase |
|---|---|
| Manufacturer | Mersen |
| Series | UltraSafe™ US22 |
| Item number | S331170 |
| Catalogue number | US223I |
| Product type | Modular cylindrical fuse holder |
| Fuse size | 22 × 58 mm |
| Number of poles | 3 |
| Rated current | 125 A |
| Rated voltage AC (UL) | 800 V |
| Rated voltage DC (UL) | 1000 V |
| Rated voltage AC (IEC) | 690 V |
| Frequency | 50 / 60 Hz |
| Visual indicator | Yes |
| Protection rating | IP20 |
| Terminal type | Pressure plate |
| Mounting type | DIN rail |
| EAN / UPC | 0782001311445 |
| HS Code | 85361090 |
| Country of Manufacture | Tunisia |
The Mersen S331170 is a three-pole modular fuse holder designed to house and protect 22 × 58 mm cylindrical fuse links in industrial electrical systems.
It is designed for standard 22 × 58 mm cylindrical fuse links.
Yes. The US223I includes an integrated visual blown-fuse indicator for rapid fault identification.
The fuse holder is rated for 125 A, 800 V AC UL, 1000 V DC UL and 690 V AC IEC.
It is commonly DIN rail mounted inside industrial control panels, switchboards and automation cabinets.
Mersen UltraSafe™ fuse holders are trusted by OEMs, panel builders and electrical engineers worldwide for dependable cylindrical fuse protection, excellent operator safety and long-term reliability.
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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...