Why Choose the Mersen FR14GR69V20T Protistor® Semiconductor Fuse?
The Mersen FR14GR69V20T is a high speed gR semiconductor fuse developed to provide complete protection for sensitive power electronic components. Part of the trusted Mersen Protistor® 14×51 gR series, this fuse is designed to safeguard semiconductors including IGBTs, thyristors, diodes and rectifiers by rapidly clearing overloads and short circuits before damage can occur.
Designed for industrial power applications, the FR14GR69V20T delivers excellent current limiting performance and a high breaking capacity while helping reduce equipment downtime and maintenance costs. The integrated striker indicator provides fast identification of an operated fuse, making maintenance quicker and improving system safety.
With a 20 A current rating, a 690 V AC IEC / 700 V AC UL voltage rating and a compact 14 × 51 mm cylindrical body, the FR14GR69V20T is ideal for industrial drives, UPS systems, inverters, power converters and other semiconductor protection applications.
Key Advantages
- High speed gR semiconductor protection fuse.
- 20 A rated current for industrial power electronics.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Integrated striker indicator for rapid fault identification.
- High interrupting capacity with excellent current limiting characteristics.
- Compact 14 × 51 mm cylindrical design for easy installation.
Key Features
- Mersen Protistor® high speed fuse series.
- 20 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- gR operating class for full semiconductor protection.
- 14 × 51 mm ceramic cylindrical body.
- Integrated striker for fuse operation indication.
- Low I²t design for improved semiconductor protection.
- IEC 60269-4 and UL 248-13 compliant.
Reliable Protection for Semiconductor Equipment
The Mersen FR14GR69V20T is specifically engineered to protect sensitive semiconductor devices against overload and short circuit conditions. Its low I²t characteristics help minimise thermal stress on power electronic components, improving equipment reliability and extending service life.
Protistor® semiconductor fuses are widely specified for industrial automation, renewable energy systems, UPS equipment and variable speed drives where rapid fault interruption is essential for protecting valuable electronic equipment.
Typical Applications
- Variable frequency drives.
- Industrial inverters.
- UPS systems.
- Power converters.
- Motor drives.
- Renewable energy equipment.
