Why Choose the Mersen C300566 High-Speed Semiconductor Fuse?
The Mersen C300566 is a premium Protistor® Size 73 high-speed semiconductor fuse engineered to provide exceptional protection for sensitive power electronic components in demanding industrial applications. Designed as part of the trusted Mersen Protistor® Size 73 aR series, it delivers ultra-fast fault interruption to safeguard IGBTs, thyristors, diodes and other semiconductor devices from damaging short-circuit currents.
Manufactured using precision die-cut fuse elements embedded in solidified sand, the C300566 offers low let-through energy and outstanding interrupting performance. Silver-plated contact surfaces and a robust square body design ensure dependable long-term operation in industrial power conversion equipment.
With a 400 A current rating and a 1250 V AC IEC / 1300 V AC UL voltage rating, the Mersen C300566 is ideally suited for variable speed drives, renewable energy converters, UPS systems and industrial power control equipment. It features DIN 110 blade terminals and an integrated striker for convenient status indication.
Key Advantages
- Ultra-fast aR semiconductor fuse for protecting power electronic equipment.
- 400 A current rating for demanding industrial applications.
- 1250 V AC IEC / 1300 V AC UL voltage rating.
- Low let-through energy helps minimise semiconductor damage.
- Integrated striker indicator for maintenance and remote monitoring.
- High interrupting capacity suitable for modern power conversion systems.
Key Features
- Mersen Protistor® Size 73 aR series.
- 400 A rated current.
- 1250 V AC IEC / 1300 V AC UL rated voltage.
- Ultra-fast aR operating characteristic.
- DIN 110 blade terminals.
- Integrated striker indication.
- Silver-plated contact surfaces.
- Designed for protecting IGBTs, SCRs, thyristors and power semiconductor modules.
Reliable Protection for Industrial Power Electronics
High-speed semiconductor fuses are designed to protect valuable power electronic components by rapidly interrupting high fault currents before they can damage sensitive devices. Their low I²t performance reduces thermal stress on semiconductor assemblies, helping improve equipment reliability and minimise costly downtime.
The Mersen Protistor® range is widely specified by OEMs and industrial engineers for use in variable frequency drives, industrial inverters, renewable energy systems and UPS installations where dependable semiconductor protection is essential.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and inverters.
- UPS and backup power systems.
- Renewable energy converters.
- Protection of IGBT, SCR and diode modules.
