Why Choose the Mersen FR14GR69V40T Protistor® High-Speed Fuse?
The Mersen FR14GR69V40T is a premium Protistor® high-speed cylindrical semiconductor fuse engineered to provide exceptional protection for sensitive power semiconductor devices in industrial power electronic systems. As part of the Protistor® 14 × 51 mm gR series, it is specifically designed to protect components such as IGBTs, diodes, thyristors and rectifiers against damaging short-circuit currents.
Designed to comply with IEC 60269-1 and IEC 60269-4, the FR14GR69V40T delivers extremely high interrupting performance and fast current limitation to help minimise damage to expensive semiconductor equipment. This version incorporates an integrated striker indicator, allowing rapid identification of an operated fuse and enabling remote signalling when used with compatible fuse holders.
With a 40 A current rating, 690 V AC (IEC) and 700 V AC (UL) voltage ratings, and a compact 14 × 51 mm cylindrical body, the Mersen FR14GR69V40T is ideal for variable speed drives, inverters, UPS systems and industrial power conversion equipment.
Key Advantages
- High-speed gR semiconductor fuse for complete semiconductor protection.
- 40 A rated current for industrial power electronics.
- 690 V AC IEC and 700 V AC UL ratings.
- Integrated striker indicator for fuse status indication.
- Very high 160 kA breaking capacity.
- Excellent current-limiting performance reduces damage to semiconductor devices.
Key Features
- Mersen Protistor® 14 × 51 mm gR series.
- Model: FR14GR69V40T.
- 40 A rated current.
- 690 V AC IEC / 700 V AC UL.
- 14 × 51 mm cylindrical fuse.
- gR operating class for full semiconductor protection.
- Integrated striker indicator.
- Complies with IEC 60269-1 and IEC 60269-4.
- RoHS compliant.
Reliable Protection for Power Electronic Systems
High-speed semiconductor fuses are specifically designed to interrupt fault currents before excessive thermal energy can damage sensitive power electronic components. Their fast operating characteristics help maximise equipment reliability while reducing maintenance costs and system downtime.
The Mersen Protistor® range is widely specified by machine builders, OEM manufacturers and electrical engineers for protecting industrial drives, converters, UPS systems, renewable energy equipment and other semiconductor-based applications requiring dependable fault protection.
Typical Applications
- Variable frequency drives.
- Industrial inverters.
- UPS systems.
- Power converters and rectifiers.
- Renewable energy systems.
- Industrial automation equipment.
