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MERSEN FUSE US142 US142
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.
£18.76
Why Choose the Mersen G331137 US142 UltraSafe Fuse Holder?
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.
Key Advantages
- Compact two-pole fuse holder for 14 × 51 mm cylindrical fuse-links.
- 50 A current rating for industrial protection circuits.
- Rated up to 800 V AC and 1000 V DC (UL).
- 750 V AC IEC rating.
- 100 kA short-circuit current rating.
- IP20 finger-safe construction improves operator safety.
- Lockable and sealable for safer maintenance procedures.
- DIN rail mounting enables quick installation.
Key Features
- Mersen UltraSafe™ US14 series.
- US142 two-pole configuration.
- Compatible with 14 × 51 mm cylindrical fuse-links.
- 50 A maximum fuse rating.
- 800 V AC / 1000 V DC UL rating.
- 750 V AC IEC rating.
- 100 kA SCCR.
- Pressure plate screw terminals.
- IP20 finger-safe design.
- DIN rail mounting.
- Optional microswitches and blown fuse indicators available.
Reliable Protection for Industrial Power Systems
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.
Typical Applications
- Industrial control panels.
- Motor control centres.
- Power distribution systems.
- Variable speed drives.
- Transformer protection.
- OEM machinery.
- Industrial automation equipment.
- Commercial electrical installations.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | None | |
|---|---|---|
| Poles | 2-pole | |
| Device Type | Fuse base / holder | |
| Fuse Type | Cylindrical | |
| Fuse Size | 14x51 mm | |
| Voltage | 800 V | |
| 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 |
Frequently Asked Questions
What is the Mersen G331137 used for?
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.
What fuse size fits the US142?
The US142 is designed for standard 14 × 51 mm cylindrical fuse-links.
What are the voltage ratings?
The fuse holder is rated up to 800 V AC and 1000 V DC under UL and 750 V AC under IEC standards.
Does the US142 include a blown fuse indicator?
No. The standard US142 is the non-indicating version. Indicator and microswitch variants are available elsewhere within the UltraSafe™ US14 range.
How is the Mersen US142 installed?
The fuse holder mounts directly onto a standard DIN rail using pressure plate screw terminals for secure electrical connections.
Trusted by Electrical Professionals Worldwide
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.
