Why Choose the Mersen FR14GR69V50T Semiconductor Fuse?
The Mersen FR14GR69V50T is a high-performance ultra-fast semiconductor fuse designed to protect sensitive power electronic equipment from overloads and short circuits. Part of the trusted Mersen Protistor® 14 × 51 gR series, it is engineered specifically for semiconductor protection in industrial automation, motor drives and power conversion systems.
Designed with a gR utilisation category, this fuse provides full-range protection for semiconductor devices while delivering exceptionally fast fault clearing and low let-through energy. The integrated striker indicator enables rapid identification of a blown fuse in compatible fuse holders, helping reduce maintenance time and system downtime.
With a rated current of 50 A and a 690 V AC IEC / 700 V AC UL voltage rating, the FR14GR69V50T is ideal for protecting inverters, UPS systems, motor drives, rectifiers and other industrial power electronic equipment. Its compact 14 × 51 mm cylindrical design allows straightforward installation into compatible fuse holders.
Key Advantages
- Ultra-fast semiconductor fuse for power electronic protection.
- 50 A rated current for industrial applications.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Full-range gR semiconductor protection.
- Integrated striker indicator for blown fuse indication.
- Low let-through energy helps protect expensive semiconductor components.
Key Features
- Mersen Protistor® semiconductor fuse.
- 50 A rated current.
- 690 V AC IEC / 700 V AC UL rating.
- gR operating class.
- 14 × 51 mm cylindrical ceramic body.
- High interrupting capacity.
- Ultra-fast fault clearing.
- Built-in striker indicator for maintenance identification.
Reliable Protection for Industrial Power Electronics
The Mersen FR14GR69V50T is designed to interrupt fault currents before they can damage expensive semiconductor devices. Its ultra-fast operating characteristics minimise thermal and electrical stress on protected components, helping improve equipment reliability and reduce costly downtime.
As part of the Protistor® semiconductor protection range, this fuse is widely specified by panel builders, OEMs and industrial maintenance engineers for applications where rapid fault clearance and dependable performance are essential.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- UPS systems.
- Power converters and inverters.
- Rectifiers and semiconductor assemblies.
- Industrial automation and control panels.
