Mersen M331142 UltraSafe US142M2I two-pole modular fuse holder for 14×51 mm cylindrical fuse links, featuring visual fuse indication, an integrated microswitch, IP20 protection and ratings up to 800 V AC and 1000 V DC.
£111.82
The Mersen M331142, also identified as the US142M2I, is a high-performance UltraSafe™ modular fuse holder designed for 14×51 mm cylindrical fuse links. Its two-pole configuration provides dependable fuse protection and circuit isolation for industrial control panels, power distribution equipment and machinery.
This fuse holder combines a built-in visual blown fuse indicator with an integrated 2 changeover contact microswitch. These monitoring features allow maintenance personnel and control systems to identify fuse operation quickly, helping reduce diagnostic time and equipment downtime.
With ratings of up to 800 V AC and 1,000 V DC, the Mersen M331142 is suitable for demanding AC and DC electrical systems. Its finger-safe IP20 construction, pressure-plate terminals and DIN rail mounting provide secure, convenient installation inside electrical enclosures.
The Mersen M331142 securely houses cylindrical fuse links while protecting users from accidental contact with live components. Its UltraSafe™ construction maintains an IP20 finger-safe protection level during normal operation and fuse replacement when correctly installed.
The visual indicator provides immediate local confirmation when a fuse has operated, while the integrated microswitch can communicate the fuse status to a PLC, alarm circuit or remote monitoring system. This combination makes the fuse holder particularly suitable for installations where continuity and rapid fault detection are important.
| Manufacturer | Mersen |
|---|---|
| Series | UltraSafe™ US14 |
| Catalogue number | M331142 |
| Product designation | US142M2I |
| Product type | Modular cylindrical fuse holder |
| Fuse size | 14 × 51 mm |
| Number of poles | 2 |
| Maximum fuse current | 50 A |
| Maximum rated voltage AC | 800 V AC |
| Maximum rated voltage DC | 1,000 V DC |
| Fuse indication | Visual blown fuse indicator |
| Auxiliary signalling | Integrated 2 changeover contact microswitch |
| Terminal type | Pressure plate |
| Protection rating | IP20 |
| Mounting type | DIN rail mounting |
| Housing material | Durable thermoplastic or thermoset material |
| HS Code | 85361050 |
| Country of Manufacture | Tunisia |
The Mersen M331142 is a two-pole modular fuse holder used to install and monitor 14×51 mm cylindrical fuse links in industrial AC and DC electrical systems.
The fuse holder is designed for 14×51 mm cylindrical fuse links with ratings appropriate for the protected circuit.
Yes. It includes a visual blown fuse indicator for local status identification and an integrated microswitch for remote signalling.
The M331142 supports fuse links rated up to 50 A and is designed for systems up to 800 V AC or 1,000 V DC, subject to the installed fuse and applicable standards.
It is designed for DIN rail mounting inside an electrical panel or enclosure and uses pressure-plate terminals for secure conductor connection.
Mersen UltraSafe™ fuse holders are widely specified by panel builders, OEMs and electrical engineers for dependable fuse protection, finger-safe operation and effective local and remote fuse-status monitoring.
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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...