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.
