Why Choose the Mersen F300569 Protistor® High-Speed Fuse?
The Mersen F300569 (catalogue number PC73UD13C550D1A) is a premium Protistor® square body high-speed semiconductor protection fuse designed to provide exceptional protection for modern power electronic equipment. Engineered specifically to safeguard IGBTs, thyristors, diodes and semiconductor modules, it delivers ultra-fast fault interruption, helping minimise damage during high fault current conditions.
As part of the advanced Mersen Protistor® Size 73 aR series, this fuse incorporates low let-through energy (I²t), silver-plated contacts and a robust ceramic square body construction. An integrated striker indicator enables remote status indication or operation of an optional microswitch, simplifying maintenance and improving system monitoring.
With a 550 A current rating and operating voltages of 1250 V AC (IEC) and 1300 V AC (UL), the F300569 is ideally suited for protecting industrial drives, power converters, renewable energy equipment, UPS systems and other demanding semiconductor applications.
Key Advantages
- Ultra-fast aR semiconductor protection fuse for power electronic equipment.
- 550 A current rating for demanding industrial applications.
- 1250 V AC IEC / 1300 V AC UL voltage rating.
- 126 kA breaking capacity for outstanding fault protection.
- Integrated striker indicator for simplified maintenance.
- Silver-plated contact surfaces provide excellent conductivity.
- Designed to protect IGBTs, thyristors, diodes and semiconductor modules.
Key Features
- Mersen Protistor® Size 73 aR series.
- 550 A rated current.
- 1250 V AC (IEC) / 1300 V AC (UL).
- Ultra-fast acting aR characteristic.
- Square body ceramic fuse construction.
- DIN 110 blade terminals.
- Integrated striker indication.
- Low I²t performance for semiconductor protection.
Reliable Protection for High-Power Electronics
The Mersen F300569 is engineered to interrupt high fault currents before they can damage expensive semiconductor devices. Its ultra-fast operating characteristics and low energy let-through help maximise equipment reliability while reducing maintenance costs and unplanned downtime.
This Protistor® fuse is widely used in industrial automation, renewable energy systems and power conversion equipment where dependable protection of semiconductor devices is essential for safe and reliable operation.
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 diodes.
- High-power power conversion equipment.
