Mersen L331141 US142M2 UltraSafe two-pole modular fuse holder for 14 x 51 mm cylindrical fuse links with two connected auxiliary microswitches, rated 50 A and IP20 finger-safe protection.
£74.44
The Mersen L331141, catalogue reference US142M2, is a premium two-pole modular fuse holder designed for 14 × 51 mm cylindrical fuse links. Part of the renowned Mersen UltraSafe™ US14 series, it delivers dependable overcurrent protection for industrial control panels, machinery, motor circuits and low voltage distribution systems.
Unlike standard fuse holders, the US142M2 is equipped with two connected auxiliary microswitches, allowing remote indication of fuse-holder status within PLCs, alarm systems and industrial monitoring equipment. Its finger-safe IP20 enclosure protects operators during normal use and fuse replacement, whilst the robust thermoplastic construction ensures long service life in demanding industrial environments.
Suitable for fuse links up to 50 A, the L331141 carries IEC ratings of 750 V AC together with UL ratings of 800 V AC and 1000 V DC. DIN rail mounting and pressure-plate terminals allow fast installation and secure cable termination for OEM machinery and industrial switchboards.
The Mersen L331141 combines dependable cylindrical fuse protection with integrated auxiliary signalling, making it particularly suitable for industrial automation systems where remote monitoring is required. The connected microswitches enable control systems to detect fuse-holder status without direct visual inspection, improving maintenance efficiency and reducing downtime.
Its modular construction, DIN rail installation and finger-safe enclosure make the US142M2 an excellent choice for electrical panel builders, machine manufacturers and industrial maintenance engineers seeking reliable, standards-compliant circuit protection.
| Manufacturer | Mersen |
|---|---|
| Series | UltraSafe™ US14 |
| Model | US142M2 |
| Item number | L331141 |
| Product type | Modular cylindrical fuse holder |
| Number of poles | 2 |
| Fuse size | 14 × 51 mm |
| Rated current | 50 A |
| Rated voltage (IEC) | 750 V AC |
| Rated voltage (UL) | 800 V AC / 1000 V DC |
| Frequency | 50 / 60 Hz |
| Short-circuit current rating | 100 kA |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Terminal type | Pressure plate |
| Auxiliary signalling | Two connected microswitches |
| Body material | Thermoplastic / thermoset insulating material |
| Compliance | IEC, UL, CSA, RoHS and UKCA |
| HS Code | 85361050 |
| Country of Manufacture | Tunisia |
The L331141 is a two-pole modular fuse holder designed for 14 × 51 mm cylindrical fuse links in industrial electrical protection applications.
It accepts standard 14 × 51 mm cylindrical fuse links rated up to 50 A.
The integrated connected microswitches provide remote indication for monitoring circuits, PLCs and alarm systems.
The US142M2 is rated at 750 V AC (IEC), 800 V AC (UL) and 1000 V DC (UL).
The fuse holder mounts onto a standard DIN rail and uses pressure-plate terminals for secure conductor termination.
Mersen UltraSafe™ fuse holders are trusted by electrical engineers, OEM manufacturers and panel builders for dependable overcurrent protection, finger-safe operation and advanced monitoring capabilities in industrial electrical systems.
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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...