Why Choose the Mersen FR14AR69V40 High-Speed Semiconductor Fuse?
The Mersen FR14AR69V40 is a Protistor® high-speed cylindrical semiconductor fuse engineered to provide ultra-fast short-circuit protection for sensitive power semiconductor devices. Designed in accordance with IEC 60269-4, it delivers excellent current-limiting performance and a high breaking capacity, making it ideal for industrial power electronic applications.
Part of the Mersen Protistor® 14 × 51 mm aR series, the FR14AR69V40 is the version without a striker indicator. Its aR operating characteristic provides partial-range semiconductor protection, making it suitable for installations where overload protection is provided elsewhere within the electrical system.
With a 40 A rated current, 690 V AC (IEC) / 700 V AC (UL) voltage rating and an exceptional 160 kA breaking capacity, the FR14AR69V40 is widely used in variable speed drives, UPS systems, industrial inverters, rectifiers and power converters.
Key Advantages
- High-speed aR semiconductor fuse for industrial power electronics.
- 40 A rated current for medium-power semiconductor circuits.
- 690 V AC (IEC) / 700 V AC (UL) voltage rating.
- 160 kA breaking capacity for demanding fault conditions.
- Current-limiting operation reduces thermal stress on semiconductor devices.
- Compact 14 × 51 mm cylindrical construction.
Key Features
- Manufacturer: Mersen.
- Series: Protistor® Size 14 × 51 aR.
- Model: FR14AR69V40.
- Rated current: 40 A.
- Rated voltage: 690 V AC (IEC) / 700 V AC (UL).
- Fuse characteristic: aR.
- Without striker indicator.
- Designed for semiconductor protection applications.
Reliable Protection for Power Electronics
Power semiconductor devices such as IGBTs, SCRs, diodes and rectifiers require extremely rapid protection against short-circuit faults. Protistor® semiconductor fuses operate significantly faster than conventional industrial fuses, reducing fault energy and helping to maximise the service life of expensive electronic equipment.
The FR14AR69V40 is intended for applications where overload protection is provided separately, while the fuse delivers exceptionally fast short-circuit protection for industrial semiconductor circuits.
Typical Applications
- Variable speed drives.
- Industrial inverters.
- UPS systems.
- Power converters.
- Motor control equipment.
- Industrial automation systems.
- Renewable energy converters.
- Power semiconductor modules.
