Why Choose the Mersen FR22AR69V125 Protistor® High-Speed Fuse?
The Mersen FR22AR69V125 is a high-performance Protistor® semiconductor protection fuse engineered to provide ultra-fast protection for sensitive power electronic devices. Designed in accordance with IEC 60269-4, this high-speed cylindrical fuse helps protect semiconductors from damaging short circuits while minimising let-through energy for enhanced equipment reliability.
As part of the trusted Mersen Protistor® 22×58 aR series, the FR22AR69V125 is ideal for demanding industrial applications including variable speed drives, UPS systems, power converters and inverter protection. Its compact cylindrical format allows easy installation into compatible fuse holders while delivering exceptional interrupting performance.
With a 125 A current rating, 690 V AC IEC / 700 V AC UL voltage rating and aR operating characteristic, this fuse is specifically designed for semiconductor protection rather than general cable or motor circuit protection, making it an excellent choice for modern power electronics.
Key Advantages
- High-speed aR semiconductor protection fuse for power electronics.
- 125 A current rating for demanding industrial applications.
- 690 V AC IEC / 700 V AC UL rated voltage.
- Low let-through energy (I²t) helps protect expensive semiconductor devices.
- Very high 160 kA breaking capacity for enhanced system protection.
- Compact 22 × 58 mm cylindrical design for straightforward installation.
Key Features
- Mersen Protistor® semiconductor protection fuse.
- Catalogue number: FR22AR69V125.
- Current rating: 125 A.
- Rated voltage: 690 V AC (IEC), 700 V AC (UL).
- Operating characteristic: aR ultra-fast.
- Fuse size: 22 × 58 mm.
- Breaking capacity: 160 kA AC.
- Designed to IEC 60269-4.
- RoHS compliant.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are specifically engineered to protect sensitive electronic components including IGBTs, SCRs, diodes and thyristors against short circuits. Their extremely rapid operation limits fault energy, helping to reduce equipment damage and minimise costly downtime.
The Mersen Protistor® range has become a preferred choice for industrial automation, renewable energy systems and power conversion equipment where dependable semiconductor protection is essential.
Typical Applications
- Variable speed drives (VSDs).
- Industrial inverters.
- UPS systems.
- Power converters.
- Semiconductor power supplies.
- Motor control equipment.
- Industrial automation systems.
- Renewable energy power electronics.
