Why Choose the Mersen F300868 Protistor® High-Speed Fuse?
The Mersen F300868 (marked 11 URD 70 D11 A 0400) is a Protistor® square body high-speed semiconductor protection fuse designed to provide rapid short-circuit protection for sensitive power electronic equipment. Engineered specifically for protecting IGBTs, thyristors, diodes and semiconductor modules, it delivers ultra-fast fault interruption to minimise damage and costly downtime.
Featuring an aR ultra-fast operating characteristic, the F300868 provides low let-through energy (I²t), helping to protect valuable semiconductor devices from the damaging effects of high fault currents. Its robust square body construction incorporates DIN 110 slotted blade terminals and an integrated striker indicator for convenient fuse status monitoring.
With a 400 A current rating and a 1100 V AC voltage rating, the F300868 is ideally suited to industrial drives, power converters, renewable energy systems, UPS installations and other demanding power electronic applications requiring dependable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 400 A current rating for demanding industrial applications.
- 1100 V AC rated voltage.
- Designed specifically for semiconductor protection.
- Low I²t helps minimise damage to sensitive power electronic devices.
- Square body construction with integrated striker indication.
- DIN 110 slotted blade terminals for secure installation.
Key Features
- Mersen Protistor® Size 70 series.
- 400 A rated current.
- 1100 V AC operating voltage.
- aR ultra-fast operating characteristic.
- Square body ceramic fuse construction.
- DIN 110 slotted blade terminals.
- Integrated striker indicator.
- Designed for semiconductor protection applications.
Reliable Protection for High-Power Electronics
The Mersen F300868 is designed to interrupt high prospective fault currents before they can damage expensive semiconductor devices. Its ultra-fast operating characteristics and low let-through energy help maximise equipment reliability while reducing maintenance costs and production downtime.
Protistor® semiconductor fuses are widely specified by OEMs and electrical engineers for applications where dependable protection of power semiconductors is essential, including industrial automation, renewable energy systems and heavy-duty power conversion equipment.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor control systems.
- Power converters and rectifiers.
- Renewable energy inverter systems.
- UPS systems.
- Industrial automation equipment.
- Protection of IGBTs, thyristors and diode modules.
- High-power power conversion equipment.
