Why Choose the Mersen FR10GR69V1.25 Protistor® Semiconductor Fuse?
The Mersen FR10GR69V1.25 is a high-speed gR semiconductor fuse engineered to provide full-range protection for sensitive power electronic components. Also identified by item number N1014565, it forms part of the proven Mersen Protistor® 10 × 38 gR series and protects semiconductor circuits against both short-circuit currents and low-level overloads.
Designed for demanding power conversion equipment, the FR10GR69V1.25 combines extremely fast operation with excellent current-limiting performance. Its low energy let-through helps reduce thermal and mechanical stress on IGBTs, thyristors, diodes, rectifiers and other discrete semiconductor devices.
With a rated current of 1.25 A, an IEC voltage rating of 690 V AC and a maximum AC breaking capacity of 160 kA, this compact 10 × 38 mm cylindrical fuse is suitable for inverters, uninterruptible power supplies, variable-speed drives and industrial control equipment requiring dependable semiconductor protection.
Key Advantages
- High-speed gR full-range semiconductor protection.
- 1.25 A rated current for low-current electronic circuits.
- 690 V AC IEC rating for demanding industrial systems.
- 160 kA AC breaking capacity for reliable fault interruption.
- Low I²t performance helps minimise damage to semiconductor devices.
- Compact 10 × 38 mm format for internationally recognised fuse holders.
Key Features
- Mersen Protistor® high-speed fuse series.
- 1.25 A rated current.
- 690 V AC IEC rated voltage.
- 700 V AC UL recognised rating.
- 500 V DC UL recognised rating.
- gR operating class for full-range semiconductor protection.
- Extremely fast-acting and current-limiting performance.
- 10 × 38 mm ceramic cylindrical body.
- Silver-plated copper ferrule terminals.
- Suitable for clip or cylindrical fuse-holder mounting.
Full-Range Protection for Sensitive Electronics
The Mersen FR10GR69V1.25 is designed to respond rapidly when excessive current flows through a semiconductor circuit. Its low pre-arcing and clearing I²t values limit the amount of energy passed during a fault, helping protect valuable electronic components and reduce the likelihood of extensive equipment damage.
Unlike partial-range aR fuses, the gR characteristic provides full-range protection against both high short-circuit currents and smaller overload currents. This makes the FR10GR69V1.25 a versatile choice for low-current semiconductor circuits where fast, dependable operation is essential.
Typical Applications
- Industrial inverters and power converters.
- Uninterruptible power supply systems.
- Variable-speed and variable-frequency drives.
- Semiconductor control circuits.
- Rectifier, diode and thyristor protection.
- Industrial automation equipment.
- Power supplies and electronic control panels.
- Renewable energy conversion equipment.
