Why Choose the Mersen FR14GR69V4 Protistor® High-Speed Fuse?
The Mersen FR14GR69V4 is a compact Protistor® high-speed cylindrical semiconductor fuse designed to provide dependable full-range protection for sensitive power semiconductor devices used in industrial power electronic systems. Classified as a gR semiconductor fuse and manufactured in accordance with IEC 60269-1 and IEC 60269-4, it delivers rapid fault interruption for both overload and short-circuit conditions, helping to maximise equipment reliability and minimise downtime.
Manufactured by Mersen, the FR14GR69V4 is engineered for demanding applications including variable frequency drives, UPS systems, industrial inverters and power conversion equipment. Its fast operating characteristics and current-limiting performance help protect valuable IGBTs, thyristors, diodes and rectifiers from damaging fault currents.
With a 4 A current rating, a 690 V AC IEC / 700 V AC UL voltage rating and a compact 14 × 51 mm cylindrical body, the FR14GR69V4 is ideal for industrial control panels where reliable semiconductor protection is essential.
Key Advantages
- Fast-acting gR semiconductor protection fuse.
- 4 A rated current for industrial power electronics.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Full-range protection against overloads and short circuits.
- Current-limiting design with low let-through energy.
- Compact 14 × 51 mm cylindrical construction.
Key Features
- Mersen Protistor® Series.
- Catalogue number: FR14GR69V4.
- gR utilisation category.
- 4 A rated current.
- 690 V AC IEC / 700 V AC UL rated.
- 14 × 51 mm cylindrical ceramic fuse.
- Current-limiting semiconductor protection.
- Complies with IEC 60269-4 and UL 248-13.
Reliable Semiconductor Protection for Industrial Equipment
The Mersen FR14GR69V4 has been engineered to rapidly interrupt excessive fault currents before they can damage costly semiconductor devices. Its low let-through energy reduces thermal and electrical stress on sensitive components, helping to extend equipment life and improve operational reliability.
As a gR class fuse, the FR14GR69V4 provides full-range protection against both overloads and short circuits, making it suitable for protecting industrial power electronic systems requiring continuous semiconductor protection.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- UPS systems.
- Industrial inverters.
- Power converters and rectifiers.
- Protection of IGBTs, thyristors and other semiconductor devices.
