Why Choose the Mersen X300239 Protistor® High-Speed Fuse?
The Mersen X300239 is a premium square body semiconductor protection fuse designed to provide ultra-fast protection for power semiconductor devices including IGBTs, thyristors and diodes. Part of the trusted Mersen Protistor® Size 33 aR series, it delivers reliable fault protection for demanding industrial power conversion and automation applications.
Designed for high interrupting performance and low energy let-through, the X300239 helps protect expensive semiconductor components from short-circuit faults while improving the reliability and service life of power electronic equipment. Its robust square body construction and silver-plated contacts ensure dependable operation in demanding industrial environments.
With a 550 A current rating and a 700 V AC operating voltage, the Mersen X300239 is ideally suited for protecting industrial drives, UPS systems, converters, renewable energy inverters and other high-power electronic equipment requiring fast semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 550 A current rating for industrial power electronics.
- 700 V AC voltage rating.
- High interrupting capacity for critical fault protection.
- Optimised for protecting IGBTs, diodes and thyristors.
- Reliable square body construction for demanding industrial applications.
Key Features
- Mersen Protistor® Size 33 series.
- 550 A rated current.
- 700 V AC rated voltage.
- aR ultra-fast operating characteristic.
- Square body bolted construction.
- Silver-plated contact surfaces.
- Low energy let-through protection.
- Designed for semiconductor device protection.
Reliable Semiconductor Protection
High-speed semiconductor fuses are specifically engineered to interrupt high fault currents before damage can occur to sensitive semiconductor devices. Their ultra-fast response helps reduce thermal stress while improving the reliability and availability of industrial power conversion systems.
The Mersen Protistor® range is widely used throughout industrial automation, renewable energy, motor control and power conversion industries where dependable semiconductor protection is essential for maintaining system uptime.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- UPS systems.
- Power converters and rectifiers.
- Renewable energy inverters.
- Industrial automation and power electronics.
