Why Choose the Mersen K300734 High-Speed Semiconductor Fuse?
The Mersen K300734 is a premium Protistor® square body high-speed semiconductor fuse designed to provide ultra-fast protection for modern power electronic equipment. Engineered for demanding industrial environments, it protects IGBTs, thyristors, diodes, rectifiers, inverters and power conversion systems against damaging short-circuit currents whilst minimising energy let-through and reducing equipment downtime.
Part of the Mersen Protistor® Size 2x73 aR series, the K300734 combines a robust square body design with silver-plated contact surfaces and an integrated striker indicator. Its high interrupting capability and low I²t characteristics make it ideal for industrial drive systems, renewable energy installations, UPS equipment and heavy-duty automation applications.
With a 1250 A current rating, 1250 V AC IEC voltage rating and 100 kA breaking capacity, the K300734 delivers dependable semiconductor protection for high-power industrial applications.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 1250 A current rating for high-power industrial applications.
- 1250 V AC IEC voltage capability.
- 100 kA breaking capacity for dependable fault interruption.
- Integrated striker indicator for rapid fuse status indication.
- Silver-plated contact surfaces provide excellent electrical conductivity.
- Designed specifically for protection of modern semiconductor devices.
Key Features
- Mersen Protistor® Size 2x73 aR series.
- 1250 A rated current.
- 1250 V AC IEC rated voltage.
- Ultra-fast aR operating characteristic.
- 100 kA AC breaking capacity.
- Integrated striker indication.
- Flush-end metric threaded terminals.
- Silver-plated contact surfaces.
- Square ceramic body construction.
Reliable Protection for High-Power Electronics
High-speed semiconductor fuses are engineered to interrupt fault currents before excessive thermal energy reaches sensitive semiconductor devices. Their ultra-fast operating characteristics help extend equipment life, improve system reliability and minimise costly production downtime.
The Mersen Protistor® range is trusted worldwide by machine builders, panel manufacturers and industrial engineers for protecting industrial drives, renewable energy converters, UPS systems and heavy-duty power conversion equipment.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial power converters.
- IGBT and thyristor protection.
- UPS systems.
- Renewable energy converters.
- Industrial motor control equipment.
- Heavy-duty semiconductor protection circuits.
