Why Choose the Mersen FR14GR69V20 Protistor® Semiconductor Fuse?
The Mersen FR14GR69V20, item number F1017203, is a high-speed Protistor® cylindrical semiconductor fuse designed to provide full-range protection for sensitive power semiconductor devices. Part of Mersen's 14 × 51 mm gR series, it is engineered for industrial power electronic applications operating at up to 690 V AC (IEC) and 700 V AC (UL).
With a 20 A current rating and gR operating characteristic, the FR14GR69V20 provides dependable protection for IGBTs, thyristors, diodes, rectifiers and other semiconductor devices used in variable speed drives, UPS systems, industrial inverters and power converters. Unlike the "T" variant, this model is supplied without a striker indicator.
Its ceramic cylindrical body, silver-plated copper ferrules and high interrupting capacity minimise let-through energy during fault conditions, helping protect expensive semiconductor components while improving equipment reliability and reducing maintenance costs.
Key Advantages
- High-speed semiconductor protection fuse.
- 20 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- gR full-range operating characteristic.
- 160 kA AC breaking capacity.
- Protects against overload and short-circuit faults.
- Low let-through energy for improved semiconductor protection.
- Compact 14 × 51 mm cylindrical format.
Key Features
- Mersen Protistor® 14 × 51 mm gR series.
- Catalogue number: FR14GR69V20.
- Item number: F1017203.
- 20 A current rating.
- 690 V AC IEC / 700 V AC UL.
- gR full-range semiconductor protection.
- No striker indicator.
- Ceramic body with silver-plated ferrules.
- Ferrule terminals for clip mounting.
- RoHS compliant.
Reliable Protection for Industrial Power Electronics
The Mersen FR14GR69V20 is designed to interrupt fault currents rapidly, limiting thermal and mechanical stress on semiconductor devices. Its current-limiting characteristics help maximise equipment reliability while extending the service life of critical power electronic components.
The gR operating class provides full-range protection against both overload and short-circuit faults, making the fuse suitable for industrial drives, UPS systems, converters and renewable energy equipment.
Typical Applications
- Variable frequency drives.
- Industrial motor drives.
- UPS systems.
- Industrial inverters.
- Power converters.
- Rectifiers.
- Semiconductor protection circuits.
- Industrial automation equipment.
