Why Choose the Mersen FR22AR69V125T High-Speed Fuse?
The Mersen FR22AR69V125T is a high-performance 125 A cylindrical semiconductor fuse engineered to provide rapid short-circuit protection for sensitive power electronic equipment. As part of the trusted Mersen Protistor® 22 × 58 mm aR fuse series, it is specifically designed to protect power semiconductors in demanding industrial applications while complying with IEC 60269-4.
Featuring an aR operating characteristic, this high-speed fuse provides partial-range protection against damaging short-circuit currents. Its low let-through energy and exceptionally high interrupting capacity help protect inverters, rectifiers, thyristors, IGBTs, variable frequency drives and other critical power electronic components from catastrophic electrical faults.
With a rated current of 125 A, an IEC rated voltage of 690 V AC and an integrated striker indication system, the FR22AR69V125T is ideal for industrial automation, motor control and power conversion applications where rapid fault indication and dependable semiconductor protection are essential.
Key Advantages
- High-speed semiconductor protection fuse for industrial power electronics.
- 125 A rated current for high-power applications.
- 690 V AC IEC voltage rating.
- aR operating characteristic for semiconductor short-circuit protection.
- 160 kA AC breaking capacity.
- Integrated striker indication for fast fuse status identification.
Key Features
- Mersen Protistor® high-speed fuse series.
- 125 A ampere rating.
- 690 V AC IEC rated voltage.
- 700 V AC UL recognised.
- aR speed and operating characteristic.
- 160 kA AC interrupting capacity.
- 2897 A²s pre-arcing I²t.
- 15500 A²s clearing I²t.
- Integrated striker indication.
- Ceramic body with silver-plated copper ferrule terminals.
Reliable Protection for High-Power Semiconductor Systems
Power semiconductor devices require extremely fast protection against short-circuit faults. The Mersen FR22AR69V125T rapidly interrupts fault currents, helping minimise thermal stress and preventing costly damage to high-value electronic equipment.
Its aR operating characteristic is specifically designed for semiconductor short-circuit protection and is normally used alongside suitable overload protection. The integrated striker provides clear mechanical indication after fuse operation, simplifying maintenance and reducing system downtime.
Typical Applications
- Variable frequency drives.
- Industrial motor control equipment.
- Power converters and inverters.
- UPS systems.
- Rectifiers and thyristor assemblies.
- Industrial automation equipment.
- Renewable energy systems.
