Why Choose the Mersen X300469 Protistor® High-Speed Fuse?
The Mersen X300469 is a heavy-duty square body semiconductor protection fuse engineered to provide ultra-fast protection for sensitive power semiconductor devices including IGBTs, thyristors and diodes. As part of the proven Mersen Protistor® Size 32 aR series, it delivers exceptional protection for modern power conversion equipment operating in demanding industrial environments.
Designed with low energy let-through characteristics and a high interrupting capacity, the X300469 minimises damage during short-circuit faults while helping maximise equipment uptime. The fuse incorporates silver-plated contact surfaces, reinforced threaded flush-end terminals and an integrated striker indicator for simplified maintenance and system monitoring.
With a 1000 A current rating and a 690 V AC IEC / 700 V AC UL voltage rating, the Mersen X300469 is ideally suited for industrial drives, UPS systems, power converters, renewable energy equipment and other high-power electronic applications requiring dependable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 1000 A current rating for demanding industrial applications.
- 690 V AC IEC / 700 V AC UL voltage capability.
- 200 kA breaking capacity for excellent short-circuit protection.
- Integrated striker indicator for convenient maintenance.
- Silver-plated contact surfaces for reliable electrical performance.
Key Features
- Mersen Protistor® Size 32 series.
- 1000 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR ultra-fast operating characteristic.
- Integrated striker indication system.
- Flush-end reinforced UNC threaded terminals.
- Square body bolted construction.
- Designed specifically for semiconductor protection.
Reliable Semiconductor Protection
High-speed semiconductor fuses are specifically designed to interrupt high fault currents before expensive semiconductor devices can be damaged. Their ultra-fast response helps minimise 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 semiconductor-based systems including drives, converters and UPS equipment.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and rectifiers.
- UPS systems.
- Renewable energy inverters.
- Industrial automation and power electronic equipment.
