Why Choose the Mersen FR14GR69V4T Protistor® Semiconductor Fuse?
The Mersen FR14GR69V4T, also identified by item number E1017179, is a high-speed Protistor® cylindrical semiconductor fuse engineered to protect sensitive power semiconductor devices from overload and short-circuit faults. As part of the Mersen Protistor® 14 × 51 mm gR series, it is specifically designed for industrial power electronics requiring rapid fault interruption and dependable equipment protection.
With a 4 A current rating and a 690 V AC IEC / 700 V AC UL rating, this fuse is ideal for protecting IGBTs, thyristors, diodes and other semiconductor components used in industrial drives, UPS systems, inverters and power conversion equipment. The integrated striker indicator provides clear blown-fuse indication for faster maintenance and fault diagnosis.
Its compact 14 × 51 mm cylindrical design allows installation in compatible fuse holders while providing extremely high breaking capacity and low let-through energy to minimise damage to valuable semiconductor devices.
Key Advantages
- High-speed semiconductor protection fuse.
- 4 A rated current for sensitive electronic equipment.
- 690 V AC IEC / 700 V AC UL rating.
- gR operating class for full-range semiconductor protection.
- Integrated striker indicator for quick fuse status identification.
- Very high breaking capacity for demanding industrial applications.
- Compact 14 × 51 mm cylindrical format.
- Designed to protect costly semiconductor devices.
Key Features
- Mersen Protistor® 14 × 51 gR series.
- 4 A rated current.
- 690 V AC IEC / 700 V AC UL.
- gR full-range semiconductor protection.
- Integrated striker indication.
- Extremely high interrupting capacity.
- IEC 60269-1 and IEC 60269-4 compliant.
- UL Recognised (UL 248-13).
- Cylindrical ceramic construction.
- Suitable for clip or fuse-holder mounting.
Reliable Protection for Power Electronics
The Mersen FR14GR69V4T is engineered to interrupt fault currents before excessive thermal energy can damage expensive semiconductor devices. Its low let-through energy and rapid operating characteristics help maximise equipment reliability while reducing repair costs and system downtime.
The Protistor® range is widely specified by machine builders, OEMs and industrial engineers for protecting inverters, motor drives, rectifiers, UPS systems and other high-performance power electronic equipment.
Typical Applications
- Variable frequency drives.
- Industrial motor drives.
- Power converters and rectifiers.
- UPS systems.
- Renewable energy inverters.
- Semiconductor protection circuits.
- Industrial automation equipment.
- Power electronic assemblies.
