Why Choose the Mersen FR10GR69V25 Protistor® Semiconductor Fuse?
The Mersen FR10GR69V25, item number F1014581, is a high-speed Protistor® cylindrical semiconductor fuse designed to provide full-range protection for sensitive power semiconductor devices. As part of the 10 × 38 mm gR 690 V AC series, it is engineered for protecting inverters, UPS systems, variable speed drives and other industrial power electronic equipment.
With a 25 A current rating, 690 V AC IEC rated voltage and gR operating characteristic, the FR10GR69V25 delivers rapid fault interruption while protecting expensive IGBTs, thyristors, diodes and rectifier modules from overload and short-circuit faults.
Its compact ceramic body, silver-plated ferrules and current-limiting design minimise thermal stress on semiconductor devices while helping to maximise equipment uptime and reliability in demanding industrial environments.
Key Advantages
- High-speed semiconductor protection fuse.
- 25 A rated current.
- 690 V AC IEC rated voltage.
- gR full-range operating characteristic.
- 50 kA AC breaking capacity.
- Protects against both overload and short-circuit faults.
- Low I²t for improved semiconductor protection.
- Compact 10 × 38 mm cylindrical format.
Key Features
- Mersen Protistor® 10 × 38 mm gR series.
- Catalogue number: FR10GR69V25.
- Item number: F1014581.
- 25 A current rating.
- 690 V AC IEC rated voltage.
- gR full-range semiconductor protection.
- 50 kA AC interrupting capacity.
- 69 A²s pre-arcing I²t.
- 425 A²s clearing I²t.
- Ceramic body with silver-plated ferrules.
Reliable Protection for Industrial Power Electronics
The Mersen FR10GR69V25 is designed to interrupt fault currents extremely quickly, limiting the energy passed to semiconductor devices and reducing the risk of costly equipment damage. Its low I²t performance and current-limiting characteristics help maximise the service life of modern power electronic equipment.
The gR operating class provides full-range protection against both overload and short-circuit conditions, making the fuse particularly suitable for inverters, UPS systems, motor drives and similar equipment rated up to 700 V.
Typical Applications
- Variable frequency drives.
- Industrial motor drives.
- UPS systems.
- Industrial inverters.
- Power converters.
- Rectifiers.
- Semiconductor protection circuits.
- Industrial automation equipment.
