Why Choose the Mersen F300822 Protistor® High-Speed Fuse?
The Mersen F300822 is a Protistor® square body high-speed semiconductor protection fuse engineered to provide rapid fault clearance for demanding power electronic applications. Identified by the description 12.5 URD 71 ESF 0315, this fuse is designed to protect sensitive semiconductor devices including IGBTs, thyristors, diodes and rectifier modules from damaging short-circuit currents.
Manufactured as part of Mersen's trusted Protistor® range, the F300822 features an aR ultra-fast operating characteristic, ensuring extremely low let-through energy (I²t) to minimise stress on valuable semiconductor components. Its square body construction and striker-equipped design make it suitable for demanding industrial installations where reliability and fast fault interruption are essential.
With a 315 A current rating and a 1250 V AC voltage rating, the F300822 is ideally suited to industrial drives, renewable energy systems, power converters, UPS equipment and other high-power electronic applications requiring dependable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 315 A current rating for demanding industrial applications.
- 1250 V AC rated voltage.
- Designed specifically for semiconductor protection.
- Low I²t limits damage to sensitive power electronic devices.
- Square body design with striker indication.
- Ideal for industrial power conversion and motor control equipment.
Key Features
- Mersen Protistor® Size 71 series.
- 315 A rated current.
- 1250 V AC operating voltage.
- aR ultra-fast fuse characteristic.
- Square body ceramic construction.
- ESF blade terminal configuration.
- Integrated striker indicator.
- Designed for semiconductor protection applications.
Reliable Protection for High-Power Electronics
The Mersen F300822 is designed to interrupt extremely high fault currents before they can damage expensive semiconductor devices. Its ultra-fast response and low let-through energy help maximise equipment reliability while reducing maintenance costs and costly production downtime.
Protistor® semiconductor fuses are widely specified by equipment manufacturers 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.
