Why Choose the Mersen B331155 UltraSafe™ US141M Fuse Holder?
The Mersen B331155, catalogue number US141M, is a premium single-pole DIN rail fuse holder designed for 14 × 51 mm cylindrical fuse links. As part of the Mersen UltraSafe™ US14 series, it incorporates an integrated auxiliary microswitch that enables remote monitoring of the fuse holder position for industrial automation and control systems.
Rated at 50 A and up to 750 V AC/DC, the US141M provides dependable circuit protection for industrial control panels, machinery, power distribution equipment and OEM applications. Its IP20 finger-safe construction helps protect operators from accidental contact with live parts, including during fuse replacement.
Designed for installation on a standard 35 mm DIN rail, the US141M features pressure-plate terminals, compact dimensions and lockable operation. The integrated microswitch allows the fuse holder status to be monitored by PLCs, SCADA systems or building management systems, helping improve maintenance efficiency and machine diagnostics.
Key Advantages
- Single-pole UltraSafe™ fuse holder for 14 × 51 mm cylindrical fuse links.
- Integrated auxiliary microswitch for remote status indication.
- 50 A current rating for industrial applications.
- Rated up to 750 V AC/DC.
- IP20 finger-safe construction for enhanced operator safety.
- Supports PLC and automation system integration.
- Compact DIN rail design conserves control-panel space.
- Lockable and sealable for maintenance and isolation procedures.
Key Features
- Mersen UltraSafe™ US14 series.
- Catalogue number: US141M.
- Manufacturer item number: B331155.
- Single-pole modular fuse holder.
- Compatible with 14 × 51 mm cylindrical fuse links.
- 50 A rated current.
- 750 V AC/DC rating.
- Integrated auxiliary microswitch.
- IP20 protection rating.
- 35 mm DIN rail mounting.
Remote Monitoring for Industrial Circuit Protection
The UltraSafe™ US141M securely accommodates a 14 × 51 mm cylindrical fuse link while providing reliable overcurrent protection. Its integrated auxiliary microswitch enables remote monitoring of the fuse holder operating position, allowing control systems to receive status information and improving preventive maintenance capabilities.
Its compact modular construction, finger-safe design and DIN rail mounting make the US141M an excellent choice for industrial automation systems, machinery and electrical control panels requiring dependable protection and remote indication.
Typical Applications
- Industrial control panels.
- PLC and automation systems.
- Motor drives and motor control circuits.
- OEM machinery.
- Power distribution equipment.
- Transformer protection.
- Industrial electrical installations.
