Why Choose the Mersen W330115 Protistor® High Speed Fuse?
The Mersen W330115 (Catalogue No. DN000UB50V350V) is a Protistor® high speed square body semiconductor fuse engineered to provide ultra-fast protection for sensitive power electronic devices. Designed specifically for safeguarding IGBTs, thyristors, diodes and rectifier assemblies, it delivers rapid fault interruption with low energy let-through to minimise semiconductor damage.
Manufactured in the compact NH Size 000 format with DIN 80 blade terminals, the W330115 features a visual blown fuse indicator for quick maintenance checks. Silver-plated contacts, pure silver fuse elements and solidified silica sand construction provide excellent current limitation and dependable performance in demanding industrial applications.
With a 350 A current rating, 500 V AC IEC / UL rating and aR operating characteristic, the W330115 is ideal for variable frequency drives, UPS systems, industrial inverters, power converters and other semiconductor-based equipment requiring reliable short-circuit protection.
Key Advantages
- Ultra-fast protection for sensitive semiconductor devices.
- 350 A rated current for demanding industrial applications.
- 500 V AC IEC / UL voltage rating.
- aR operating class for semiconductor short-circuit protection.
- Visual blown fuse indicator for simplified maintenance.
- Compact NH Size 000 design for modern power conversion equipment.
Key Features
- Mersen Protistor® high speed semiconductor fuse.
- Manufacturer part number: W330115.
- Catalogue number: DN000UB50V350V.
- NH Size 000 square body construction.
- 350 A current rating.
- 500 V AC IEC / UL rating.
- aR operating characteristic.
- DIN 80 blade terminals.
- Visual operation indicator.
- Silver-plated contacts and pure silver fuse elements.
Designed for High-Speed Semiconductor Protection
The Mersen W330115 is specifically engineered for protecting power semiconductors against destructive short-circuit currents. Its low I²t characteristics reduce the thermal and mechanical stress imposed on expensive electronic components, helping improve equipment reliability and minimise costly downtime.
The fuse's aR characteristic provides partial-range semiconductor protection and should be used alongside suitable overload protection where required by the equipment design.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial inverters.
- Power converters.
- Rectifier equipment.
- UPS systems.
- Motor drive systems.
- Renewable energy power conversion equipment.
- Semiconductor protection circuits.
