Why Choose the Mersen FR14GR69V25T Protistor® Semiconductor Fuse?
The Mersen FR14GR69V25T is a high speed gR semiconductor fuse developed to provide full-range protection for sensitive power semiconductor devices. Part of the trusted Mersen Protistor® 14×51 gR series, this fuse is specifically designed to protect IGBTs, thyristors, diodes and rectifiers against overloads and short circuits in demanding industrial applications.
Designed for modern power electronic systems, the FR14GR69V25T combines excellent current limiting characteristics with a high breaking capacity to minimise damage during electrical faults. The integrated striker indicator provides a mechanical indication when the fuse operates, enabling faster maintenance and reduced downtime.
With a rated current of 25 A, a 690 V AC IEC / 700 V AC UL voltage rating and a compact 14 × 51 mm cylindrical body, the FR14GR69V25T is ideally suited to industrial drives, UPS systems, power converters, inverters and renewable energy equipment requiring dependable semiconductor protection.
Key Advantages
- High speed gR semiconductor protection fuse.
- 25 A rated current for industrial power electronics.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Integrated striker indicator for rapid fault identification.
- 160 kA breaking capacity for reliable fault interruption.
- Compact 14 × 51 mm cylindrical construction for straightforward installation.
Key Features
- Mersen Protistor® high speed fuse series.
- 25 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- gR operating class for full semiconductor protection.
- Integrated striker indication.
- 14 × 51 mm ceramic cylindrical body.
- Low I²t design for enhanced semiconductor protection.
- IEC 60269-1, IEC 60269-4 and UL 248-13 compliant.
Reliable Protection for Semiconductor Equipment
The Mersen FR14GR69V25T is designed to deliver rapid protection against overload and short circuit conditions in semiconductor-based equipment. Its low energy let-through characteristics help minimise thermal stress on valuable electronic components while maintaining reliable system operation.
Protistor® gR semiconductor fuses are widely used in industrial automation, renewable energy installations, motor drives and power conversion equipment where dependable circuit protection is essential for maintaining operational continuity.
Typical Applications
- Variable frequency drives.
- Industrial inverters.
- UPS systems.
- Power converters.
- Motor control equipment.
- Renewable energy systems.
