Why Choose the Mersen FR22AR69V40T Protistor® High-Speed Fuse?
The Mersen FR22AR69V40T (Item No. D1056669) is a premium Protistor® high-speed cylindrical semiconductor fuse designed to provide ultra-fast aR protection for sensitive power semiconductor devices. Specifically engineered for power electronic applications, it protects IGBTs, thyristors, SCRs, diodes and rectifiers against damaging short-circuit currents. The integrated mechanical striker indicator enables rapid identification of an operated fuse and supports compatible remote indication systems for improved maintenance efficiency.
Manufactured in accordance with IEC 60269-4, this 22 × 58 mm cylindrical fuse delivers excellent current-limiting performance with very low I²t values, helping to minimise thermal and mechanical stress on valuable semiconductor components. Its high interrupting capacity and fast operating characteristics maximise equipment reliability while reducing costly downtime.
Rated at 40 A and 690 V AC (IEC) / 700 V AC (UL), the FR22AR69V40T is ideally suited for variable speed drives, UPS systems, industrial inverters, power converters and other demanding semiconductor protection applications.
Key Advantages
- Ultra-fast aR semiconductor protection.
- 40 A current rating.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Integrated mechanical striker indicator.
- Low I²t minimises thermal stress on semiconductor devices.
- 160 kA breaking capacity for demanding industrial applications.
Key Features
- Mersen Protistor® Size 22 × 58 mm.
- 40 A rated current.
- aR operating class for semiconductor short-circuit protection.
- Integrated mechanical striker indicator.
- Current-limiting ceramic construction.
- Excellent cycling capability.
- High interrupting capacity.
- RoHS compliant.
Fast Protection for Sensitive Semiconductor Devices
The FR22AR69V40T is engineered to interrupt high fault currents before damaging levels of thermal energy can reach sensitive semiconductor devices. Its low let-through energy improves equipment reliability, extends component life and helps minimise expensive production downtime.
The integrated mechanical striker provides fast visual indication following fuse operation and can also be utilised with compatible monitoring systems to simplify maintenance procedures.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial inverters.
- UPS systems.
- Power converters.
- Servo drives.
- Renewable energy systems.
- Industrial automation equipment.
