Why Choose the Mersen FR14AR69V8 High-Speed Fuse?
The Mersen FR14AR69V8 is a high-performance 8 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 cannot react quickly enough to damaging fault currents.
This high-speed fuse features an aR operating class, providing partial-range protection against short-circuit currents for semiconductor devices. Its low pre-arcing energy and exceptionally high interrupting capacity help protect diodes, thyristors, rectifiers, inverters, variable frequency drives and other power electronic equipment from catastrophic electrical faults.
With a rated current of 8 A and an IEC rated voltage of 690 V AC, the FR14AR69V8 is ideal for industrial automation, power conversion and motor control applications. Its compact 14 × 51 mm ceramic body allows straightforward installation into compatible cylindrical fuse holders.
Key Advantages
- High-speed semiconductor protection fuse for industrial power electronics.
- 8 A rated current for precise low-current circuit protection.
- 690 V AC IEC voltage rating for industrial power systems.
- Extremely high 160 kA AC breaking capacity.
- Low pre-arcing energy helps minimise semiconductor damage.
- Compact 14 × 51 mm cylindrical design for standard fuse holders.
Key Features
- Mersen Protistor® high-speed fuse series.
- 8 A ampere rating.
- 690 V AC IEC rated voltage.
- 700 V AC UL recognised.
- aR speed and operating characteristic.
- 160 kA AC interrupting capacity.
- 3.3 A²s pre-arcing I²t.
- 30 A²s clearing I²t.
- Ceramic body with silver-plated copper ferrule terminals.
Reliable Semiconductor Protection
Power semiconductor devices require extremely fast fault interruption to prevent permanent damage. The Mersen FR14AR69V8 rapidly limits fault current and reduces the thermal energy reaching sensitive electronic components, helping minimise equipment damage and costly downtime.
Its aR operating characteristic provides short-circuit protection for semiconductor devices and is intended to be used alongside suitable overload protection where required. The fuse is widely used in industrial drives, UPS systems, power converters and automation equipment.
Typical Applications
- Variable frequency drives.
- Industrial motor control equipment.
- Power converters and inverters.
- Rectifiers and thyristor assemblies.
- UPS systems.
- Industrial automation equipment.
- Semiconductor protection circuits.
