Why Choose the Mersen FR14AR69V50 Protistor® High-Speed Fuse?
The Mersen FR14AR69V50 is a premium Protistor® high-speed cylindrical semiconductor fuse designed to provide rapid short-circuit protection for sensitive power semiconductor devices. As part of the Protistor® 14 × 51 mm aR series, it is specifically engineered for industrial power electronics including variable speed drives, inverters, UPS systems and power converters.
Designed in accordance with IEC 60269-4, the FR14AR69V50 offers outstanding current limiting performance and an exceptionally high breaking capacity, helping to minimise damage to expensive semiconductor components such as IGBTs, SCRs, thyristors and rectifier modules. Its compact cylindrical design allows straightforward installation within compatible fuse holders used in industrial electrical equipment.
With a 50 A current rating, 690 V AC (IEC) and 700 V AC (UL) voltage ratings, and a 14 × 51 mm body size, the Mersen FR14AR69V50 provides dependable protection for modern power electronic systems operating in demanding industrial environments.
Key Advantages
- High-speed aR semiconductor fuse for partial-range semiconductor protection.
- 50 A rated current for industrial power electronic equipment.
- 690 V AC IEC and 700 V AC UL voltage ratings.
- Excellent current limiting performance for semiconductor protection.
- 160 kA breaking capacity for dependable fault interruption.
- Designed for demanding industrial automation and power conversion systems.
Key Features
- Mersen Protistor® 14 × 51 mm aR series.
- Model: FR14AR69V50.
- 50 A rated current.
- 690 V AC IEC / 700 V AC UL.
- 14 × 51 mm cylindrical fuse.
- aR operating class for semiconductor protection.
- 160 kA AC breaking capacity.
- Complies with IEC 60269-4.
- RoHS compliant.
Reliable Protection for Industrial Power Electronics
High-speed semiconductor fuses are designed to interrupt fault currents before excessive thermal energy can damage sensitive electronic components. Their extremely fast operating characteristics help maximise equipment reliability while reducing downtime and maintenance costs.
The Mersen Protistor® range is widely used by OEM manufacturers, panel builders and industrial engineers for protecting drives, converters, UPS systems and other semiconductor-based power electronic equipment operating at voltages up to 700 V AC.
Typical Applications
- Variable frequency drives.
- Industrial inverters.
- UPS systems.
- Power converters and rectifiers.
- Industrial automation equipment.
- Motor control systems.
