Why Choose the Mersen F300454 Protistor® High-Speed Fuse?
The Mersen F300454 (catalogue number A070UD33TTI1400) is a premium Protistor® square body semiconductor protection fuse designed to provide ultra-fast protection for high-power semiconductor devices. Engineered specifically for safeguarding IGBTs, thyristors, diodes and other power electronic components, it delivers exceptional performance in demanding industrial power conversion applications.
As part of the renowned Mersen Protistor® Size 33 aR series, this high-speed fuse offers low let-through energy (I²t), high interrupting capacity and dependable short-circuit protection. Its reinforced threaded terminals, silver-plated contacts and integrated striker indicator simplify installation while ensuring reliable operation in critical electrical systems.
Rated at 1400 A with a 690 V AC IEC / 700 V AC UL voltage rating, the F300454 is ideally suited for protecting large variable speed drives, power converters, UPS systems, renewable energy equipment and heavy-duty industrial automation installations.
Key Advantages
- Ultra-fast aR semiconductor protection fuse for sensitive power electronics.
- 1400 A current rating for high-power industrial applications.
- 690 V AC IEC / 700 V AC UL operating voltage.
- 200 kA breaking capacity for outstanding fault interruption.
- Integrated striker indicator for remote indication and easier maintenance.
- Silver-plated contact surfaces provide excellent conductivity.
- Designed to protect IGBTs, SCRs, diodes and other semiconductor devices from short-circuit damage.
Key Features
- Mersen Protistor® Size 33 aR series.
- 1400 A rated current.
- 690 V AC (IEC) / 700 V AC (UL).
- Ultra-fast acting aR characteristic.
- Square body fuse with reinforced threaded terminals.
- Integrated striker for fuse indication and microswitch compatibility.
- Low I²t design for superior semiconductor protection.
- Suitable for demanding industrial power conversion systems.
Advanced Protection for High-Power Electronics
High-speed semiconductor fuses are specifically engineered to interrupt fault currents before costly semiconductor devices can be damaged. The Mersen Protistor® series combines exceptionally low let-through energy with rapid fault interruption to maximise equipment reliability and minimise downtime.
The F300454 is widely used throughout industrial automation, renewable energy, motor control and heavy power conversion systems where dependable semiconductor protection is essential for maintaining operational continuity.
Typical Applications
- Variable frequency drives (VFDs).
- High-power motor drives.
- Industrial power converters.
- UPS systems.
- Renewable energy inverters.
- Soft starters.
- Industrial automation equipment.
- Protection of IGBTs, SCRs and semiconductor modules.
