Why Choose the Mersen X300561 Protistor® High-Speed Fuse?
The Mersen X300561 is a premium square body semiconductor protection fuse designed to provide ultra-fast protection for sensitive power semiconductor devices including IGBTs, thyristors and diodes. As part of the Mersen Protistor® Size 72 aR series, it delivers dependable protection for modern high-power conversion equipment operating in demanding industrial environments.
Engineered with low energy let-through characteristics and high interrupting capacity, the X300561 helps minimise damage caused by short-circuit faults while improving equipment reliability and reducing downtime. Its square body construction incorporates silver-plated contacts, DIN 110 blade terminals and an integrated striker indicator for simplified maintenance and monitoring.
With a 630 A current rating and a 1100 V AC IEC / 1200 V AC UL voltage rating, the Mersen X300561 is ideally suited for protecting industrial drives, UPS systems, converters, renewable energy equipment and other high-voltage power electronic applications.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 630 A current rating for demanding industrial applications.
- 1100 V AC IEC / 1200 V AC UL voltage capability.
- 150 kA breaking capacity for dependable fault protection.
- Integrated striker indicator for simplified maintenance.
- Silver-plated DIN 110 blade terminals ensure reliable electrical performance.
Key Features
- Mersen Protistor® Size 72 series.
- 630 A rated current.
- 1100 V AC IEC / 1200 V AC UL rated voltage.
- aR ultra-fast operating characteristic.
- Integrated striker indication system.
- DIN 110 blade terminals.
- Square body bolted construction.
- Designed specifically for semiconductor protection.
Reliable Semiconductor Protection
High-speed semiconductor fuses are specifically engineered to interrupt fault currents before expensive semiconductor devices can be damaged. Their ultra-fast response helps reduce thermal stress while maintaining the reliability and performance of industrial power conversion equipment.
The Mersen Protistor® range is widely used throughout industrial automation, renewable energy, transportation and heavy industry, providing dependable protection for drives, converters, rectifiers and UPS systems.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and rectifiers.
- UPS systems.
- Renewable energy inverters.
- Industrial automation and power electronic equipment.
