Why Choose the Mersen C300520 High-Speed Semiconductor Fuse?
The Mersen C300520 is a premium Protistor® square body high-speed semiconductor fuse designed to provide exceptional protection for sensitive power semiconductor devices in industrial power conversion systems. As part of the proven Mersen Protistor® Size 71 aR series, it delivers ultra-fast fault interruption to safeguard IGBTs, thyristors, diodes and other semiconductor components from damaging short-circuit currents.
Engineered for demanding industrial applications, the C300520 combines low let-through energy with high breaking capacity to maximise equipment protection and minimise downtime. Its robust square body construction, silver-plated contacts and solidified sand technology ensure dependable long-term operation in harsh electrical environments.
With a 350 A current rating and 1250 V AC IEC / 1300 V AC UL voltage rating, the Mersen C300520 is ideally suited for variable speed drives, UPS systems, renewable energy converters, industrial rectifiers and power electronic equipment. An integrated striker indicator simplifies maintenance and remote fuse monitoring.
Key Advantages
- High-speed aR semiconductor fuse for protecting power electronic devices.
- 350 A current rating for demanding industrial applications.
- 1250 V AC IEC / 1300 V AC UL voltage rating.
- Ultra-fast fault clearing helps minimise semiconductor damage.
- Integrated striker indicator for simplified maintenance.
- High interrupting capacity for reliable protection of industrial equipment.
Key Features
- Mersen Protistor® Size 71 aR series.
- 350 A rated current.
- 1250 V AC IEC / 1300 V AC UL rated voltage.
- Ultra-fast aR protection characteristic.
- Square body fuse with flush metric threaded terminals.
- Integrated striker mechanism.
- Silver-plated contact surfaces.
- Designed for protection of IGBT, SCR and diode power modules.
Reliable Protection for Industrial Power Electronics
High-speed semiconductor fuses are specifically designed to protect valuable power electronic components from destructive short-circuit faults. Their ultra-fast operation limits fault energy before it reaches sensitive semiconductor devices, helping reduce equipment damage, maintenance costs and production downtime.
The Mersen Protistor® range is widely used by OEMs and industrial engineers to protect variable frequency drives, renewable energy converters, UPS systems, industrial rectifiers and other high-performance power conversion equipment requiring dependable semiconductor protection.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor control systems.
- UPS and backup power equipment.
- Power converters and inverters.
- Renewable energy systems.
- Protection of IGBT, SCR and diode modules.
