Why Choose the Mersen FR14AR69V20 Protistor® Semiconductor Fuse?
The Mersen FR14AR69V20 is a high-speed aR semiconductor fuse engineered to provide rapid short-circuit protection for sensitive power semiconductor devices. Part of the trusted Mersen Protistor® 14 × 51 aR series, this fuse is specifically designed to protect IGBTs, thyristors, diodes and rectifiers in demanding industrial power electronic applications.
Designed to meet the requirements of IEC 60269-4, the FR14AR69V20 delivers exceptional current limiting performance and extremely fast fault interruption to minimise thermal and mechanical stress on valuable semiconductor components. Its compact ceramic cylindrical construction provides reliable operation in high-performance electrical systems.
With a rated current of 20 A, an operating voltage of 690 V AC (IEC) and 700 V AC (UL), together with a high breaking capacity of 160 kA, the FR14AR69V20 is ideal for industrial inverters, UPS systems, variable-speed drives and power conversion equipment.
Key Advantages
- High-speed aR semiconductor protection fuse.
- 20 A rated current for industrial power electronic circuits.
- 690 V AC IEC / 700 V AC UL voltage rating.
- 160 kA breaking capacity for dependable fault interruption.
- Low I²t characteristics help minimise semiconductor damage.
- Compact 14 × 51 mm cylindrical design.
Key Features
- Mersen Protistor® high-speed fuse series.
- 20 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR operating class for semiconductor short-circuit protection.
- 160 kA AC breaking capacity.
- 14 × 51 mm ceramic cylindrical body.
- Silver-plated copper ferrule terminals.
- Suitable for clip or compatible fuse holder mounting.
- UL recognised and IEC compliant.
Reliable Protection for Power Electronics
The Mersen FR14AR69V20 has been developed to interrupt dangerous short-circuit currents before excessive electrical energy can damage expensive semiconductor devices. Its fast operating characteristic and low energy let-through help reduce thermal stress, extending the service life of industrial power electronic equipment.
As an aR-class fuse, the FR14AR69V20 provides partial-range protection against high fault currents and should be coordinated with suitable overload protection where required by the application.
Typical Applications
- Variable frequency drives.
- Industrial inverters.
- UPS systems.
- Power converters.
- Motor control equipment.
- Industrial automation systems.
- Renewable energy installations.
- Semiconductor power supplies.
