Mersen G331137 US142 UltraSafe two-pole modular fuse holder for 14 x 51 mm cylindrical fuse-links, rated 50 A, 800 V AC UL and 1000 V DC UL.
£31.27
The Mersen G331137, catalogue reference US142, is a premium two-pole modular fuse holder designed for use with 14 × 51 mm cylindrical fuse-links. As part of the trusted Mersen UltraSafe™ US14 series, it provides dependable overcurrent protection for industrial power distribution, machinery, motor control and automation systems while delivering finger-safe operation and simple maintenance.
The US142 features a compact modular design with IP20 finger-safe protection, including during fuse replacement. It is designed for DIN rail mounting and supports field assembly into multi-pole configurations where required. Lockable and sealable operation also enhances electrical safety during maintenance procedures.
Rated at 50 A, with UL voltage ratings up to 800 V AC and 1000 V DC and an IEC rating of 750 V AC, the US142 is suitable for demanding industrial applications requiring reliable protection and long service life.
The Mersen US142 securely holds two 14 × 51 mm cylindrical fuse-links, providing dependable protection against overloads and short circuits in industrial electrical systems. When used with correctly selected fuse-links, it helps protect motors, transformers, drives and control equipment while simplifying maintenance through its compact modular design.
Its robust thermoplastic construction, finger-safe design and DIN rail mounting make the US142 suitable for OEM machinery, industrial switchboards and modern automation systems where reliability and operator safety are essential.
| Manufacturer | Mersen |
|---|---|
| Series | UltraSafe™ US14 |
| Model | US142 |
| Manufacturer item number | G331137 |
| Product type | Modular cylindrical fuse holder |
| Fuse size | 14 × 51 mm |
| Number of poles | 2 |
| Current rating | 50 A |
| Maximum fuse rating | 50 A |
| Rated voltage AC (UL) | 800 V AC |
| Rated voltage DC (UL) | 1000 V DC |
| Rated voltage AC (IEC) | 750 V AC |
| Frequency | 50 / 60 Hz |
| Short-circuit current rating | 100 kA |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Terminal type | Pressure plate screw terminals |
| Wire size | 1.5 to 35 mm² rigid, 1.5 to 25 mm² stranded |
| Operating temperature | -25°C to +60°C |
| Dimensions (H × W × D) | approximately 107 × 53 × 94 mm |
| Product weight | approximately 0.283 kg |
| EAN / UPC | 0782001310974 |
| HS Code | 85361050 |
| Country of Manufacture | Tunisia |
The Mersen G331137 US142 is a two-pole modular fuse holder that protects industrial AC and DC circuits using 14 × 51 mm cylindrical fuse-links.
The US142 is designed for standard 14 × 51 mm cylindrical fuse-links.
The fuse holder is rated up to 800 V AC and 1000 V DC under UL and 750 V AC under IEC standards.
No. The standard US142 is the non-indicating version. Indicator and microswitch variants are available elsewhere within the UltraSafe™ US14 range.
The fuse holder mounts directly onto a standard DIN rail using pressure plate screw terminals for secure electrical connections.
Mersen UltraSafe™ fuse holders are trusted by panel builders, OEM manufacturers and industrial engineers for dependable circuit protection, finger-safe operation and long-term reliability in demanding industrial environments.
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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...