Why Choose the Mersen Q302671 Protistor® High-Speed Fuse?
The Mersen Q302671 (PC72GB69V450D1A) is a premium Protistor® Size 72 gR square body high-speed fuse designed to provide full-range protection for power semiconductor devices and associated equipment. Engineered for demanding industrial power conversion applications, it delivers rapid fault interruption while protecting both semiconductor devices and associated cabling from overloads and short circuits.
Manufactured using pure silver fuse elements embedded in solidified sand with silver-plated contacts, the Q302671 offers excellent cycling capability, low I²t characteristics and high interrupting capacity. Its integrated striker indicator simplifies maintenance and allows remote status indication when used with an optional microswitch.
Rated at 450 A and 690 V AC, this Protistor® gR fuse is ideally suited to protecting industrial inverters, motor drives, UPS systems and other power conversion equipment requiring dependable semiconductor protection.
Key Advantages
- Full-range gR semiconductor protection against overloads and short circuits.
- 450 A current rating.
- 690 V AC IEC voltage rating.
- Excellent cycling capability for demanding industrial applications.
- Low I²t performance helps minimise semiconductor damage.
- Integrated striker indication for simplified maintenance.
Key Features
- Mersen Protistor® Size 72 series.
- Catalogue number: PC72GB69V450D1A.
- gR full-range operating characteristic.
- 450 A rated current.
- 690 V AC IEC.
- DIN 110 blade terminals.
- Integrated striker indicator.
- Ceramic square body with silver-plated copper terminals.
Reliable Protection for Power Conversion Equipment
The Protistor® Size 72 gR range has been engineered to provide complete protection for modern semiconductor equipment. The full-range gR characteristic protects both semiconductor devices and associated conductors from overloads and short-circuit faults, reducing maintenance costs while improving system reliability.
These high-performance fuses are widely used throughout industrial automation, renewable energy, motor drives, UPS installations and power conversion equipment where dependable semiconductor protection is critical.
Typical Applications
- Industrial inverters.
- Variable speed drives (VSDs).
- Motor drives.
- UPS systems.
- Power converters.
- Semiconductor protection circuits.
- Industrial automation equipment.
- Renewable energy power conversion systems.
