Why Choose the Mersen F300661 Protistor® High-Speed Fuse?
The Mersen F300661 (catalogue number A130UD71LLI200) is a premium Protistor® square body high-speed semiconductor protection fuse designed to provide maximum protection for modern power electronic equipment. Engineered specifically for safeguarding IGBTs, thyristors, diodes and semiconductor modules, it delivers ultra-fast fault interruption while minimising damage caused by high fault currents.
As part of the trusted Mersen Protistor® Size 71 aR series, this fuse features low let-through energy (I²t), silver-plated contact surfaces and a robust square body construction filled with solidified sand for superior arc control. The integrated striker indicator allows remote indication or operation of an optional microswitch, simplifying maintenance and improving system monitoring.
Rated at 200 A with operating voltages of 1250 V AC (IEC) and 1300 V AC (UL), the F300661 is ideally suited for protecting industrial drives, power converters, renewable energy systems, UPS installations and other demanding semiconductor applications.
Key Advantages
- Ultra-fast aR semiconductor protection fuse for sensitive power electronics.
- 200 A current rating for industrial applications.
- 1250 V AC IEC / 1300 V AC UL voltage rating.
- 126 kA breaking capacity for outstanding fault interruption.
- Integrated striker indicator for simplified maintenance.
- Silver-plated contacts provide excellent conductivity and long service life.
- Designed to protect IGBTs, thyristors, diodes and semiconductor modules.
Key Features
- Mersen Protistor® Size 71 aR series.
- 200 A rated current.
- 1250 V AC (IEC) / 1300 V AC (UL).
- Ultra-fast acting aR characteristic.
- Square body ceramic fuse construction.
- Long slotted blade terminals.
- Integrated striker indication.
- Low I²t performance for superior semiconductor protection.
Reliable Protection for High-Power Electronics
The Mersen F300661 is designed 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 throughout industrial automation, renewable energy systems and power conversion equipment where dependable protection of semiconductor devices is essential for safe, 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.
