Why Choose the Mersen P075545 High-Speed Semiconductor Fuse?
The Mersen P075545 is an ultra-rapid high-speed semiconductor fuse designed to protect sensitive power electronic equipment against damaging short-circuit currents. Part of the established Mersen Protistor BS88-4 range, it provides excellent current limitation and dependable fault interruption for demanding industrial applications.
Identified by the alternative catalogue reference BS36UG25V525T, the P075545 features an aR partial-range operating class specifically developed for semiconductor protection. Its rapid response helps reduce peak fault current and let-through energy, limiting electrical, thermal and mechanical stress on components such as diodes, thyristors, rectifiers and IGBTs.
With a rated current of 525 A and a rated voltage of 250 V AC, the Mersen P075545 is suitable for high-current drives, rectifiers, converters, inverters and industrial power supplies. Its compact 36 × 27 mm British Standard fuse-link body, angled bolted terminals and integrated striker support secure installation and convenient fuse-operation indication.
Key Advantages
- Ultra-rapid semiconductor fuse for industrial power electronics.
- 525 A rated current for high-current conversion equipment.
- 250 V AC rated voltage for low-voltage industrial systems.
- aR operating class provides dedicated semiconductor short-circuit protection.
- Excellent current limitation helps minimise component damage and downtime.
- Integrated striker provides clear fuse-operation indication.
Key Features
- Mersen Protistor BS88-4 semiconductor fuse range.
- 525 A nominal current rating.
- 250 V AC rated voltage.
- aR partial-range semiconductor protection characteristic.
- Compact 36 × 27 mm BS fuse-link format.
- Integrated striker indication system.
- Angled bolted connection terminals.
- Designed for converters, drives and power semiconductor equipment.
Rapid Protection for High-Current Power Electronics
The Mersen P075545 is engineered to interrupt dangerous fault currents before excessive energy can reach sensitive semiconductor components. Its ultra-rapid operating performance limits peak current and total let-through energy, helping protect power modules and associated electrical equipment.
As an aR-class fuse, the P075545 provides partial-range protection against semiconductor short-circuit currents. Suitable supplementary overload protection should be incorporated where complete protection against both overload and short-circuit conditions is required.
Typical Applications
- Variable frequency drives and industrial motor controllers.
- High-current rectifiers and power converters.
- Industrial inverters and power conversion systems.
- Uninterruptible power supply equipment.
- Battery chargers and DC power supplies.
- Semiconductor-controlled machinery and automation systems.
