Why Choose the Mersen M331142 UltraSafe™ US142M2I Fuse Holder?
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.
Key Advantages
- Designed for 14×51 mm cylindrical fuse links.
- Two-pole configuration for simultaneous circuit protection.
- Integrated visual blown fuse indicator supports rapid fault identification.
- Built-in 2 changeover contact microswitch enables remote fuse-status signalling.
- Rated for systems up to 800 V AC and 1,000 V DC.
- Finger-safe IP20 protection, including during fuse replacement.
- Pressure-plate terminals provide secure conductor connections.
- Compact DIN rail format simplifies control-panel installation.
Key Features
- Mersen UltraSafe™ US14 series.
- Manufacturer reference M331142.
- Product designation US142M2I.
- Accepts 14×51 mm cylindrical fuse links.
- Two-pole modular fuse holder.
- Maximum fuse current rating of 50 A.
- 800 V AC maximum voltage rating.
- 1,000 V DC maximum voltage rating.
- Integrated visual fuse-status indicator.
- Integrated 2 changeover contact microswitch.
- Pressure-plate terminal connection.
- DIN rail mounting and IP20 finger-safe protection.
Safe Fuse Protection with Local and Remote Indication
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.
Typical Applications
- Industrial control panels and electrical enclosures.
- AC and DC power distribution systems.
- Motor control centres and machinery.
- Industrial automation and PLC-controlled equipment.
- Renewable energy and DC electrical systems.
- OEM equipment and production machinery.
- Remote fuse-status monitoring circuits.
