Why Choose the Mersen FR14GR69V25 Protistor® High-Speed Fuse?
The Mersen FR14GR69V25 is a high-performance Protistor® semiconductor protection fuse designed to provide rapid, full-range protection for sensitive power electronic components. Its gR operating characteristic enables the fuse to protect semiconductor devices against both overload and short-circuit currents while limiting damaging fault energy.
As part of the established Mersen Protistor® 14 × 51 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. Its compact ferrule design allows straightforward installation in compatible fuse clips and modular fuse holders.
With a rated current of 25 A, an IEC voltage rating of 690 V AC and a high 160 kA breaking capacity, the FR14GR69V25 provides dependable circuit protection for demanding industrial applications. The fuse is manufactured with a ceramic body and silver-plated copper terminals for reliable electrical and thermal performance.
Key Advantages
- High-speed gR full-range semiconductor protection fuse.
- 25 A rated current for industrial power electronic equipment.
- 690 V AC IEC voltage rating.
- Protects semiconductor devices against overloads and short circuits.
- 160 kA breaking capacity for dependable fault interruption.
- Compact 14 × 51 mm cylindrical format for simple installation.
Key Features
- Mersen Protistor® high-speed fuse series.
- 25 A rated current.
- 690 V AC IEC rated voltage.
- gR full-range operating characteristic.
- 14 × 51 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 FR14GR69V25 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. This makes the FR14GR69V25 suitable for applications requiring comprehensive protection of semiconductor devices within industrial power conversion and automation systems.
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.
