Why Choose the Mersen FR14AR69V6 High-Speed Fuse?
The Mersen FR14AR69V6 is a high-performance 6 A cylindrical semiconductor fuse designed to provide rapid and reliable protection for sensitive power electronic components. Part of the trusted Mersen Protistor® 14 × 51 mm aR fuse series, it is engineered for industrial applications where conventional fuses may not respond quickly enough to damaging overcurrent conditions.
This high-speed fuse features an aR operating class, making it suitable for partial-range protection of semiconductors against short-circuit currents. Its low pre-arcing energy and extremely high interrupting capacity help protect components such as diodes, thyristors, rectifiers, inverters and variable speed drives from potentially destructive electrical faults.
With a rated current of 6 A and an IEC rated voltage of 690 V AC, the FR14AR69V6 is suitable for demanding power conversion and industrial automation systems. Its compact ceramic body measures approximately 14.3 × 51 mm, allowing straightforward installation in compatible cylindrical fuse holders and mounting clips.
Key Advantages
- High-speed semiconductor protection fuse for power electronic equipment.
- 6 A rated current for precise protection of low-current circuits.
- 690 V AC IEC voltage rating for industrial power systems.
- Extremely high 160 kA AC breaking capacity.
- Low pre-arcing energy helps minimise damage to sensitive semiconductors.
- Compact 14 × 51 mm cylindrical format for convenient installation.
Key Features
- Mersen Protistor® high-speed fuse series.
- 6 A ampere rating.
- 690 V AC rated voltage in accordance with IEC specifications.
- aR speed and operating characteristic.
- 160 kA maximum AC interrupting capacity.
- 2.4 A²s melting I²t.
- 20 A²s clearing I²t at rated voltage.
- Durable ceramic body with silver-plated copper ferrule terminals.
Reliable Protection for Power Semiconductors
Power semiconductors can be damaged by short-duration fault currents before conventional circuit protection devices have time to operate. The Mersen FR14AR69V6 is designed with a fast response and low I²t characteristics, helping to limit the thermal energy passed through to sensitive electronic components during a short circuit.
Its aR classification provides partial-range protection against high fault currents and is typically used alongside appropriate overload protection. The fuse is well suited to power conversion systems, industrial drives and electronic control equipment where rapid fault isolation and dependable circuit protection are essential.
Typical Applications
- Variable frequency drives and motor control equipment.
- Industrial inverters and power converters.
- Rectifiers, thyristors and diode protection.
- Uninterruptible power supply systems.
- Battery chargers and power supplies.
- Industrial automation and control panels.
- Renewable energy and energy storage equipment.
