Why Choose the Mersen L300574 Protistor® High-Speed Fuse?
The Mersen L300574, catalogue number PC73UD90V10CD1A, is a Protistor® Size 73 square body high-speed semiconductor fuse engineered to provide advanced protection for high-power semiconductor equipment. Featuring an ultra-fast aR operating characteristic, it delivers exceptional short-circuit protection for IGBTs, thyristors, diodes and other sensitive power electronic devices operating in demanding industrial applications.
Designed for high-energy power conversion systems, the L300574 combines high breaking capacity with low let-through energy to minimise damage during fault conditions. It features DIN 110 blade terminals, silver-plated contacts and an integrated striker indicator for optional remote fuse monitoring, ensuring dependable long-term performance.
With a 1000 A current rating, 900 V AC IEC and 1000 V AC UL voltage ratings, the Mersen L300574 is ideally suited to heavy-duty industrial drives, renewable energy converters, UPS systems, traction equipment and other high-power semiconductor applications.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 1000 A current rating for demanding industrial applications.
- 900 V AC IEC / 1000 V AC UL voltage capability.
- Low I²t characteristics help minimise semiconductor damage.
- 150 kA AC breaking capacity.
- DIN 110 blade terminals for secure bolted installation.
- Integrated striker for optional remote indication.
Key Features
- Mersen Protistor® Size 73 series.
- Catalogue number: PC73UD90V10CD1A.
- 1000 A rated current.
- 900 V AC IEC / 1000 V AC UL rated voltage.
- aR ultra-fast operating characteristic.
- DIN 110 blade terminals.
- Integrated low-voltage striker indicator.
- Silver-plated contact surfaces.
- Square body ceramic construction.
Designed for High-Power Semiconductor Protection
Protistor® semiconductor fuses are specifically developed to interrupt high fault currents before expensive semiconductor devices suffer catastrophic damage. Their low energy let-through characteristics help maximise equipment reliability while reducing maintenance costs across demanding industrial power conversion systems.
The robust square body construction, precision fuse elements, silver-plated contacts and integrated striker indicator make the Mersen L300574 an excellent choice for protecting high-power converters, industrial drives and renewable energy systems requiring dependable semiconductor protection.
Typical Applications
- High-power variable speed drives.
- Industrial power converters.
- Renewable energy inverters.
- Large UPS systems.
- Traction and transportation power electronics.
- Industrial rectifiers.
- IGBT, thyristor and diode protection.
