Why Choose the Mersen J076483 High-Voltage Motor Protection Fuse?
The Mersen J076483, catalogue number 45ASB120V125P-3, is a high-voltage DIN back-up fuse-link specifically engineered to protect medium-voltage motors against damaging short-circuit currents. As part of the Mersen Limitor® aSJB/D series, it is designed to withstand the repeated peak currents associated with motor starting while delivering dependable current-limiting protection in demanding industrial applications.
Rated at 12 kV AC and 125 A, the J076483 rapidly interrupts high fault currents, helping minimise thermal and mechanical stress on motors, cables, switchgear and associated equipment. The robust construction ensures long service life and reliable operation in industrial motor control systems.
Manufactured using a durable melamine fibreglass body, silver-plated copper fuse elements and silver-plated brass end caps, the fuse incorporates a 20 N striker for operating compatible switchgear mechanisms or providing fuse indication. It measures approximately 67 mm in diameter and 442 mm in length.
Key Advantages
- Designed specifically for medium-voltage motor protection.
- 12 kV AC rated voltage for industrial power systems.
- 125 A rated current.
- Current-limiting operation reduces fault energy.
- Designed to withstand repeated motor starting currents.
- 20 N striker for switchgear tripping or fuse indication.
- Premium silver-plated components and melamine fibreglass construction.
- Suitable for medium-voltage motor starters and switchgear.
Key Features
- Mersen Limitor® aSJB/D motor protection fuse.
- 12 kV AC IEC rated voltage.
- 125 A rated current.
- 50 kA breaking capacity.
- 67 mm fuse diameter.
- 442 mm overall length.
- 20 N striker mechanism.
- Designed for repeated motor starting duty.
- Silver-plated copper fuse elements.
- Silver-plated brass end caps.
- Melamine fibreglass insulating body.
- RoHS compliant.
Reliable Protection for Medium-Voltage Motors
The Mersen J076483 has been developed specifically for high-voltage motor circuits where repeated motor starting currents occur. Unlike standard transformer fuses, the Limitor® aSJB/D range is engineered to withstand frequent inrush currents while rapidly clearing damaging short-circuit faults, helping maximise motor reliability and minimise downtime.
Its current-limiting characteristics reduce fault energy reaching protected equipment, while the integrated striker enables compatible switching devices to disconnect the circuit safely following fuse operation.
Typical Applications
- Medium-voltage motor starters.
- Industrial motor protection.
- Mining and heavy industry.
- Water and wastewater pumping stations.
- Process manufacturing plants.
- High-voltage switchgear.
- Utility and infrastructure installations.
