Why Choose the Mersen FR14GR69V40 High-Speed Fuse?
The Mersen FR14GR69V40 is a high-performance 40 A cylindrical semiconductor fuse designed to provide rapid and dependable protection for sensitive power electronic components. As part of the trusted Mersen Protistor® 14 × 51 mm gR fuse series, it delivers full-range protection against overloads and short-circuit faults in demanding industrial applications.
Featuring a gR operating characteristic, this high-speed fuse protects semiconductor devices across the complete current range. Its low let-through energy and exceptionally high breaking capacity help minimise damage to diodes, thyristors, rectifiers, inverters, variable frequency drives and other power electronic equipment.
With a rated current of 40 A and an IEC rated voltage of 690 V AC, the FR14GR69V40 is ideal for industrial automation, power conversion and motor control systems. This version is supplied without a striker indicator, making it suitable where remote indication is not required.
Key Advantages
- High-speed semiconductor protection fuse for industrial power electronics.
- 40 A rated current for medium-power applications.
- 690 V AC IEC voltage rating.
- gR full-range characteristic protects against overloads and short circuits.
- 160 kA AC breaking capacity for excellent fault protection.
- Compact 14 × 51 mm cylindrical design for standard fuse holders.
Key Features
- Mersen Protistor® high-speed fuse series.
- 40 A ampere rating.
- 690 V AC IEC rated voltage.
- 700 V AC UL recognised.
- gR speed and operating characteristic.
- 160 kA AC breaking capacity.
- 210 A²s pre-arcing I²t.
- 1050 A²s clearing I²t at rated voltage.
- Ceramic body with silver-plated copper ferrules.
Full-Range Protection for Power Electronics
The Mersen FR14GR69V40 is designed to protect sensitive semiconductor devices against both sustained overloads and high fault currents. Its gR operating characteristic provides complete protection across the full operating range, helping extend equipment life and reduce costly downtime.
Protistor® semiconductor fuses are widely used in industrial drives, UPS systems, converters and renewable energy equipment where extremely fast fault interruption is essential for protecting expensive power electronic components.
Typical Applications
- Variable frequency drives.
- Industrial motor control equipment.
- UPS systems.
- Power converters and inverters.
- Rectifiers and thyristor assemblies.
- Renewable energy equipment.
- Industrial automation and control panels.
