Why Choose the Mersen FR22GR69V20T Protistor® High-Speed Fuse?
The Mersen FR22GR69V20T is a premium Protistor® high-speed cylindrical fuse developed to provide rapid and reliable protection for sensitive power semiconductor devices operating in industrial electrical systems. Designed in accordance with IEC 60269-1 and IEC 60269-4, this gR class fuse delivers outstanding fault protection for equipment where semiconductor reliability is critical. The T suffix denotes the version fitted with an integrated striker indicator for remote indication or fuse monitoring.
Manufactured by Mersen, a recognised global specialist in electrical protection, the FR22GR69V20T is widely used to protect IGBTs, thyristors, diodes and rectifiers in variable speed drives, UPS systems, power converters and industrial automation equipment. Its fast fault-clearing performance helps minimise damage to expensive semiconductor components while improving overall system reliability.
Featuring a 20 A current rating, 690 V AC IEC / 700 V AC UL voltage rating and a compact 22 × 58 mm cylindrical body with striker, this fuse is ideal for industrial control panels and power electronic installations requiring dependable semiconductor protection.
Key Advantages
- High-speed gR semiconductor protection fuse.
- Integrated striker indicator for fuse status monitoring.
- 20 A current rating for industrial power electronics.
- 690 V AC IEC / 700 V AC UL rated.
- High interrupting capacity for enhanced equipment protection.
- Compact 22 × 58 mm cylindrical design for straightforward installation.
Key Features
- Mersen Protistor® Series.
- Catalogue number: FR22GR69V20T.
- gR operating class for semiconductor protection.
- 20 A rated current.
- 690 V AC IEC / 700 V AC UL voltage rating.
- 22 × 58 mm cylindrical body.
- Integrated striker indicator for remote signalling.
- Complies with IEC 60269-1 and IEC 60269-4.
Fast Protection for Critical Power Semiconductors
The Mersen FR22GR69V20T is specifically engineered to protect semiconductor devices from destructive overcurrents and short circuits. Its high-speed operating characteristics reduce thermal stress on IGBTs, thyristors and rectifiers, helping to extend equipment life while maintaining system uptime.
The integrated striker mechanism provides convenient fuse indication and can be used with monitoring systems for faster maintenance and fault diagnosis, making it particularly suitable for industrial automation and power conversion equipment.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor control systems.
- UPS and standby power equipment.
- Industrial inverters and converters.
- Rectifier assemblies.
- Semiconductor protection in electrical control panels.
