Why Choose the Mersen W330184 Protistor® High Speed Fuse?
The Mersen W330184 (Catalogue No. DN000UB69V125L) is a Protistor® high speed square body semiconductor fuse designed to provide ultra-fast protection for sensitive power electronic devices. Engineered specifically for safeguarding IGBTs, thyristors, diodes and rectifier assemblies, it delivers exceptional current limitation and low energy let-through to help prevent costly semiconductor damage.
Manufactured in the compact NH Size 000 format with DIN 80 blade terminals, the W330184 incorporates a striker (trip indicator) for operation with compatible microswitch accessories. Silver-plated contacts, pure silver fuse elements and solidified silica sand construction ensure dependable performance in demanding industrial environments.
With a 125 A current rating, 690 V AC IEC / UL rating, 500 V DC UL rating and an aR operating characteristic, the W330184 is ideally suited to 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.
- 125 A rated current for industrial power electronic applications.
- 690 V AC IEC / UL voltage rating.
- aR operating class for semiconductor short-circuit protection.
- 200 kA breaking capacity for exceptional fault interruption.
- Integrated striker for remote indication via compatible microswitch.
Key Features
- Mersen Protistor® high speed semiconductor fuse.
- Manufacturer part number: W330184.
- Catalogue number: DN000UB69V125L.
- NH Size 000 square body construction.
- 125 A current rating.
- 690 V AC IEC / UL, 500 V DC UL.
- aR operating characteristic.
- DIN 80 blade terminals.
- Integrated striker for fuse indication.
- Silver-plated contacts and pure silver fuse elements.
Designed for High-Speed Semiconductor Protection
The Mersen W330184 has been developed to protect expensive power semiconductors against destructive short-circuit currents. Its low I²t characteristics minimise thermal and mechanical stress, helping to maximise equipment reliability while reducing maintenance costs and downtime.
Its aR operating characteristic provides partial-range protection specifically for semiconductor devices 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.
