Why Choose the Mersen P075890 High-Speed Semiconductor Fuse?
The Mersen P075890 is a high-performance Protistor® semiconductor fuse-link designed to provide rapid and dependable protection for sensitive power electronic equipment. Manufactured in a compact British Standard format, it combines extremely high breaking capacity with effective current limitation for demanding industrial power conversion and control applications.
Featuring a gR full-range operating class, the P075890 protects power semiconductors against both overload and short-circuit currents. Its fast operating characteristics help restrict peak fault current and let-through energy, reducing electrical, thermal and mechanical stress on components such as diodes, thyristors, IGBTs and rectifier assemblies.
With a rated current of 50 A and an IEC rated voltage of 690 V AC, the Mersen P075890 is suitable for variable frequency drives, industrial rectifiers, inverters, UPS equipment and power converters. Its compact 17 × 49 mm BS88-4 fuse-link format supports straightforward installation in compatible fuse holders and semiconductor protection assemblies.
Key Advantages
- High-speed semiconductor fuse for industrial power electronics.
- 50 A rated current for control and power conversion circuits.
- 690 V AC IEC voltage rating for demanding industrial systems.
- gR full-range operating class protects against overloads and short circuits.
- Extremely high breaking capacity helps minimise equipment damage.
- Supports selective coordination with other fuses in the distribution circuit.
Key Features
- Mersen Protistor® BS88-4 semiconductor fuse range.
- 50 A nominal current rating.
- 690 V AC IEC rated voltage.
- 700 V AC and 700 V DC UL ratings.
- gR full-range semiconductor protection characteristic.
- Compact 17 × 49 mm fuse-link body.
- British Standard bolted blade connection format.
- UL Recognised construction for international industrial applications.
Full-Range Protection for Power Electronics
The Mersen P075890 is engineered to interrupt dangerous currents before excessive energy can damage sensitive semiconductor devices. Its rapid operation and current-limiting performance help reduce fault energy within power conversion equipment, improving system reliability and limiting the risk of costly component failure.
Unlike partial-range aR fuse-links, the P075890 has a gR characteristic that clears both overload and short-circuit currents. This provides comprehensive semiconductor protection and can simplify coordination within correctly designed industrial electrical systems.
Typical Applications
- Variable frequency drives and motor-control equipment.
- Industrial rectifiers and power converters.
- Inverters and renewable-energy conversion systems.
- Uninterruptible power supply equipment.
- Industrial battery chargers and power supplies.
- Semiconductor-controlled machinery and automation systems.
