Why Choose the Mersen L300482 Protistor® High-Speed Fuse?
The Mersen L300482, catalogue number A070UD31TTI800, is a Protistor® Size 31 square body high-speed semiconductor fuse designed to provide advanced protection for sensitive power electronic equipment. Its ultra-fast aR operating characteristic delivers reliable short-circuit protection for IGBTs, thyristors, diodes and other semiconductor devices used in industrial power conversion systems.
Designed for demanding industrial applications, the L300482 combines low let-through energy with a high interrupting capacity to minimise damage during fault conditions. It features flush ends with UNC threaded connections and an integrated striker indicator for optional remote fuse monitoring.
Rated at 800 A with 690 V AC (IEC) and 700 V AC (UL) voltage ratings, the Mersen L300482 is suitable for industrial drives, converters, UPS equipment, renewable energy systems and other high-performance power electronic applications.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 800 A current rating for demanding industrial applications.
- 690 V AC IEC / 700 V AC UL voltage capability.
- Protects IGBTs, thyristors, diodes and other semiconductor devices.
- Integrated striker indicator for remote monitoring.
- Low I²t design helps minimise semiconductor damage.
Key Features
- Mersen Protistor® Size 31 series.
- Catalogue number: A070UD31TTI800.
- 800 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR ultra-fast operating characteristic.
- Flush ends with UNC threaded terminals.
- Silver-plated contact surfaces.
- Integrated low-voltage striker indication.
- Square body bolted construction.
High-Speed Protection for Power Electronics
Protistor® semiconductor fuses are engineered to interrupt high fault currents before sensitive power electronic devices are damaged. Their low energy let-through characteristics help maximise equipment availability while reducing repair costs in industrial power conversion systems.
The robust square body construction, silver-plated contacts and precision fuse elements ensure dependable long-term performance across industrial automation, renewable energy and power conversion applications.
Typical Applications
- Variable speed motor drives.
- Industrial power converters.
- IGBT and thyristor protection.
- UPS and backup power systems.
- Renewable energy inverters.
- Industrial automation and power electronic equipment.
