The US271NI Fuse Holder is engineered for superior safety and reliability in demanding industrial and commercial applications, accommodating 27×60 mm UL fuses rated up to 800VAC/800VDC. Its UltraSafe™ design ensures touch-safe operation (IP20), with a clear visual indicator for effortless fuse status identification and enhanced maintenance efficiency.
£200.61
The Mersen K226421 is a genuine UltraSafe™ US271NI modular fuse holder designed for 27 × 60 mm cylindrical fuse-links. Part of the proven Modulostar® CMS27 / UltraSafe™ US27 range, this 1 Pole + Neutral (1P+N) fuse holder combines enhanced operator safety with reliable circuit protection for industrial power distribution and control systems. It incorporates a visual blown-fuse indicator and complies with both IEC and UL requirements.
Engineered with IP20 finger-safe protection, the US271NI enables safe fuse replacement while reducing the risk of accidental contact with live components. Manufactured from durable thermoplastic material, it provides excellent mechanical strength, long service life and dependable performance in demanding industrial environments.
The K226421 supports 800 V AC/DC systems, accepts standard 27 × 60 mm cylindrical fuse-links and features Faston lug connections for quick installation. The modular design also supports field assembly into multi-pole configurations and compatibility with optional auxiliary microswitches for remote fuse status indication.
The Mersen K226421 is engineered for industrial switchboards, distribution systems and OEM equipment where safe fuse installation and rapid fault identification are essential. Its visual indication window allows maintenance personnel to quickly identify an operated fuse, helping reduce troubleshooting time and improve system availability.
Its modular construction allows expansion into multi-pole assemblies using compatible accessories while maintaining the high safety standards expected from the UltraSafe™ product range. The robust thermoplastic housing provides long-term durability in demanding industrial environments.
| Phase | Single Phase |
|---|---|
| Item number | K226421 |
| Catalogue No | US271NI |
| Description | Fuse Holder UltraSafe™ 800VAC 800VDC UL Fuse size 27x60 1-pole+N Visual Indicator Faston Lugs IP20 |
| EAN/UPC Code | 3605340269024 |
| Rated voltage AC UL | 800 V |
| Rated voltage DC UL | 800 V |
| Rated voltage AC IEC | 800 V |
| Rated voltage DC IEC | 800 V |
| Ampere Rating | 140 A |
| RoHS Compliant | Yes |
| AC or DC | AC/DC |
| Fuse Size | 27x60 |
| Design Details | single pole + neutral conductor |
| Indication System | Yes |
| Indication System Type | Visual Indicator |
| Number of Poles | 1-pole+N |
| Torque Rating | 3.5 Nm |
| Rated Impulse Withstand Voltage | 8 kV |
| Rated Insulation Voltage | 800 V |
| Max Power dissipation of Fuse Links Pn | 11 W |
| Installation Mounting | DIN rail acc. EN 60715 |
| Product Width | 80 mm |
| Product Length | 93.5 mm |
| Product Height | 149.4 mm |
| Sell Pack Quantity | 1 EA |
| Sell Pack Weight | 0.303 kg |
| Sell Pack Width | 154.9 mm |
| Sell Pack Length | 165.1 mm |
| Sell Pack Height | 100.1 mm |
| Product group | Fuse Holders |
| Conventional Free Air thermal Current With Fuse-Links Ith | 140 A |
| Product Weight | 0.303 kg |
| HS Code | 85361090 |
| Country of Manufacture | Tunisia |
The K226421 is designed for 27 × 60 mm cylindrical fuse-links.
The US271NI is a 1 Pole + Neutral (1P+N) modular fuse holder.
Yes. The K226421 features an integrated visual blown-fuse indicator for fast fault identification.
Yes. It is designed for quick and secure DIN rail installation within industrial electrical panels.
Yes. The UltraSafe™ design provides IP20 finger-safe protection, including during fuse replacement.
Mersen UltraSafe™ modular fuse holders are trusted worldwide by panel builders, OEM manufacturers and electrical engineers for dependable fuse installation, operator safety and long-term industrial 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...