Why Choose the Mersen A300564 High-Speed Semiconductor Fuse?
The Mersen A300564 is a premium Protistor® square body high-speed semiconductor fuse designed to deliver exceptional protection for modern power electronic equipment. Engineered specifically for semiconductor applications, it provides ultra-fast fault interruption to safeguard diodes, thyristors, IGBTs and other sensitive power devices from damaging short-circuit currents.
As part of the renowned Mersen Protistor® Size 73 series, the A300564 combines high breaking capacity with low let-through energy to minimise equipment damage and reduce downtime. Manufactured using precision fuse elements embedded in solidified sand with silver-plated contact surfaces, it delivers consistent performance in demanding industrial environments.
Featuring a 315 A current rating and a 1250 V AC IEC / 1300 V AC UL voltage rating, the A300564 is ideally suited for protecting variable frequency drives, inverters, UPS systems, soft starters and industrial power converters. The integrated striker indicator provides fast visual indication of fuse operation and can be used with compatible microswitches for remote monitoring.
Key Advantages
- High-speed aR semiconductor protection fuse for critical power electronics.
- 315 A current rating for demanding industrial applications.
- 1250 V AC IEC / 1300 V AC UL voltage capability.
- Ultra-fast operation helps protect expensive semiconductor devices.
- Integrated striker indicator for easy fuse status monitoring.
- Reliable protection for industrial power conversion systems.
Key Features
- Mersen Protistor® Size 73 series.
- Square body high-speed semiconductor fuse.
- 315 A rated current.
- 1250 V AC IEC / 1300 V AC UL rated voltage.
- aR ultra-fast operating characteristic.
- DIN 110 blade terminals.
- Integrated striker indication.
- Silver-plated contacts for dependable electrical performance.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are engineered to interrupt fault currents before they can damage costly semiconductor components. Their extremely fast response and low let-through energy improve equipment reliability, minimise downtime and help extend the operational life of industrial power conversion systems.
The Mersen Protistor® Size 73 range is trusted by OEMs, system integrators and maintenance engineers for protecting variable speed drives, converters and other high-value electrical equipment operating in demanding industrial environments.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial inverters and converters.
- UPS systems.
- Soft starters.
- Renewable energy power converters.
- Industrial motor control and automation systems.
