Why Choose the Mersen F301029 Protistor® High-Speed Fuse?
The Mersen F301029 (catalogue number A130UD71TTI315) is a premium Protistor® square body high-speed semiconductor protection fuse engineered to provide outstanding protection for modern power electronic equipment. Specifically designed to safeguard IGBTs, thyristors, diodes and semiconductor modules, it delivers ultra-fast fault interruption to minimise damage during high fault current conditions.
As part of the proven Mersen Protistor® Size 71 aR series, this fuse features die-cut fuse elements embedded in solidified sand for excellent arc control, low let-through energy (I²t), silver-plated contact surfaces and a robust ceramic square body. The integrated striker indicator can operate an optional microswitch, simplifying maintenance and remote monitoring.
Rated at 315 A with operating voltages of 1250 V AC (IEC) and 1300 V AC (UL), the F301029 is ideally suited to industrial drives, power converters, UPS systems, renewable energy equipment and other demanding semiconductor protection applications.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 315 A current rating for demanding 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 specifically to protect IGBTs, thyristors, diodes and semiconductor modules.
Key Features
- Mersen Protistor® Size 71 aR series.
- 315 A rated current.
- 1250 V AC (IEC) / 1300 V AC (UL).
- Ultra-fast acting aR characteristic.
- Square body ceramic fuse construction.
- Flush end UNC threaded terminals.
- Integrated striker indication.
- Low I²t performance for superior semiconductor protection.
Reliable Protection for High-Power Electronics
The Mersen F301029 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.
Protistor® semiconductor fuses are widely specified in industrial automation, renewable energy systems and power conversion equipment where dependable semiconductor protection 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.
