Why Choose the Mersen FR22GR69V125T Protistor® High-Speed Fuse?
The Mersen FR22GR69V125T is a high-performance Protistor® semiconductor protection fuse with striker, designed to provide rapid, full-range protection for sensitive power electronic components. Its gR operating characteristic protects semiconductor devices against both overload and short-circuit currents while limiting damaging fault energy.
As part of the established Mersen Protistor® 22 × 58 mm series, this high-speed cylindrical fuse is suitable for protecting IGBTs, thyristors, diodes, rectifiers and other semiconductor devices used in industrial drives and power conversion equipment. The integrated striker provides clear mechanical indication when the fuse has operated and can activate compatible auxiliary signalling equipment.
With a rated current of 125 A, an IEC voltage rating of 690 V AC and a high 160 kA breaking capacity, the FR22GR69V125T provides dependable circuit protection for demanding industrial applications. Its ceramic body, silver-plated copper ferrules and compact clip-mounted format support reliable electrical and thermal performance.
Key Advantages
- High-speed gR full-range semiconductor protection fuse.
- 125 A rated current for high-power electronic equipment.
- 690 V AC IEC voltage rating.
- Protects semiconductor devices against overloads and short circuits.
- Integrated striker indication system for fuse status signalling.
- 160 kA breaking capacity for dependable fault interruption.
- Compact 22 × 58 mm cylindrical format for simple installation.
Key Features
- Mersen Protistor® high-speed fuse series.
- 125 A rated current.
- 690 V AC IEC rated voltage.
- gR full-range operating characteristic.
- Integrated striker indicator.
- 22 × 58 mm cylindrical fuse size.
- 160 kA AC breaking capacity.
- Low let-through energy for semiconductor protection.
- Silver-plated copper ferrule terminals.
- Durable ceramic insulating body.
Reliable Full-Range Semiconductor Protection
High-speed gR fuses are designed to respond rapidly to electrical faults before excessive thermal energy can damage sensitive semiconductor components. By limiting peak current and total let-through energy, the FR22GR69V125T helps reduce stress on power electronic devices and supports improved equipment reliability.
Unlike partial-range aR fuses, a gR fuse provides full-range protection against both overload and short-circuit conditions. The integrated striker also allows compatible fuse holders or auxiliary contacts to provide local or remote indication when the fuse has operated.
Typical Applications
- Variable speed and variable frequency drives.
- Industrial inverters and rectifiers.
- Uninterruptible power supply systems.
- Industrial power converters.
- Motor control and automation equipment.
- Semiconductor power supplies.
- Renewable energy conversion systems.
- Industrial machinery and OEM control panels.
