Why Choose the Mersen FR14AR69V25T High-Speed Semiconductor Fuse?
The Mersen FR14AR69V25T is a premium Protistor® high-speed cylindrical semiconductor fuse designed to provide reliable short-circuit protection for power semiconductor devices in industrial power electronic systems. As part of the trusted Mersen Protistor® 14 × 51 mm aR series, this fuse incorporates an integrated striker indicator, enabling rapid fault indication and simplified maintenance within industrial installations.
Manufactured in accordance with IEC 60269-4, the FR14AR69V25T delivers extremely fast fault interruption and excellent current-limiting characteristics, helping to protect expensive semiconductor components from catastrophic damage. It is widely used in variable speed drives, UPS systems, inverters, converters and industrial automation equipment.
With a 25 A current rating, 690 V AC IEC / 700 V AC UL voltage rating and compact 14 × 51 mm cylindrical body, this fuse provides dependable protection whilst fitting standard semiconductor fuse holders used in industrial control panels and electrical systems.
Key Advantages
- High-speed aR semiconductor protection fuse.
- Integrated striker indicator for easy fault indication.
- 25 A current rating for industrial power electronics.
- 690 V AC IEC / 700 V AC UL rated.
- Excellent current-limiting performance reduces equipment damage.
- Compact 14 × 51 mm cylindrical design for straightforward installation.
Key Features
- Mersen Protistor® semiconductor fuse series.
- 14 × 51 mm cylindrical fuse.
- 25 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR utilisation category for partial-range semiconductor protection.
- Integrated striker for remote fuse status indication.
- Rated breaking capacity of 160 kA.
- Designed for industrial power conversion equipment.
Reliable Protection for Industrial Power Electronics
The Mersen FR14AR69V25T rapidly clears fault currents before they can damage sensitive semiconductor devices such as IGBTs, SCRs and power diodes. Its low let-through energy helps minimise thermal and mechanical stress, extending equipment life and reducing maintenance costs.
The built-in striker provides clear fuse operation indication and allows integration with compatible monitoring systems, making it particularly suitable for modern industrial automation and power conversion applications.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial inverters and converters.
- UPS systems.
- Servo drives and motion control equipment.
- Rectifiers and DC power supplies.
- Industrial automation panels and OEM machinery.
