Why Choose the Mersen L330244 Protistor® High-Speed Fuse?
The Mersen L330244 (DN00UB69V350L) is a premium square body high-speed semiconductor protection fuse engineered to protect sensitive power electronic components from short circuits and fault currents. Part of the trusted Mersen Protistor® series, this ultra-fast aR fuse is designed for demanding industrial applications involving power conversion equipment, variable speed drives, UPS systems and semiconductor devices.
Designed to provide outstanding protection for IGBTs, thyristors, diodes and other semiconductor components, the L330244 features low let-through energy (I²t), high breaking capacity and silver-plated contacts for reliable long-term performance. Its robust square body construction with DIN 80 blade terminals ensures dependable installation in industrial electrical systems.
With a 350 A current rating and 690 V AC IEC operating voltage, the Mersen L330244 is ideal for protecting modern industrial power conversion equipment where fast fault interruption is essential to minimise equipment damage and downtime.
Key Advantages
- Ultra-fast aR semiconductor protection fuse for sensitive electronic equipment.
- 350 A current rating for high-power industrial applications.
- 690 V AC IEC rated voltage for demanding electrical installations.
- Designed to protect IGBTs, thyristors and power semiconductors.
- Low I²t performance reduces damage during fault conditions.
- Square body DIN 80 blade design enables simple installation and replacement.
Key Features
- Mersen Protistor® high-speed fuse series.
- Catalogue number: DN00UB69V350L.
- 350 A rated current.
- 690 V AC IEC rated voltage.
- Ultra-fast aR operating characteristic.
- Square body NH00 design with DIN 80 blade contacts.
- Integrated striker for fuse status indication.
- Silver-plated contact surfaces for excellent conductivity.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are specifically designed to interrupt extremely high fault currents before sensitive electronic components can be damaged. The Mersen Protistor® series delivers exceptionally fast fault clearing while maintaining low let-through energy, making it ideal for protecting modern power conversion equipment.
The L330244 is commonly installed in industrial drives, UPS systems, converters and renewable energy equipment where reliable semiconductor protection is critical to maintaining system uptime and equipment longevity.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and rectifiers.
- UPS and backup power systems.
- Renewable energy inverters.
- Semiconductor protection in industrial control equipment.
