Why Choose the Mersen R301085 High-Speed Semiconductor Fuse?
The Mersen R301085, catalogue reference A050UD32TTI1800, is a genuine Protistor® Size 32 high-speed semiconductor fuse designed to protect modern power conversion equipment against damaging short-circuit currents. Rated at 1800A, it is intended for applications operating up to 450VAC (IEC) and 500VAC (UL).
Its ultra-fast aR operating characteristic provides reliable protection for sensitive semiconductor devices including diodes, thyristors and IGBT modules. Die-cut fuse elements embedded in solidified silica sand deliver low let-through energy (I²t), excellent current limiting and high interrupting performance during fault conditions.
The fuse features flush ends with UNC threaded terminals, silver-plated contact surfaces, a robust square ceramic body and an integrated striker capable of operating an optional microswitch for remote indication. These features make it suitable for demanding industrial power electronic applications.
Key Benefits
- Ultra-fast aR protection for semiconductor devices.
- 1800A current rating for high-power industrial equipment.
- Rated up to 450VAC IEC and 500VAC UL.
- Integrated striker provides blown-fuse indication.
- Flush-end UNC threaded terminals provide secure mounting.
- Low I²t helps minimise semiconductor damage.
- Silver-plated contacts improve electrical performance.
- Designed for demanding industrial power conversion systems.
Key Features
- Mersen Protistor® Size 32 semiconductor fuse.
- Manufacturer part number: R301085.
- Catalogue number: A050UD32TTI1800.
- Square-body high-speed fuse.
- aR ultra-fast characteristic.
- 1800A rated current.
- 450VAC IEC rating.
- 500VAC UL rating.
- Flush ends with UNC threaded terminals.
- Integrated striker indicator.
- Silver-plated contact surfaces.
- Non-magnetic mounting hardware.
- RoHS compliant.
Typical Applications
- Variable speed drives.
- Industrial power converters.
- Rectifiers.
- Inverters.
- UPS systems.
- Renewable energy converters.
- Battery energy storage systems.
- Industrial welding equipment.
- Protection of IGBT modules.
- Protection of thyristors and power diodes.
Engineered for Semiconductor Protection
Protistor® semiconductor fuses are specifically designed to protect expensive power electronic devices against destructive short-circuit currents. Their advanced construction provides rapid fault interruption, low arc energy and high interrupting capability while helping to maximise equipment reliability.
