Why Choose the Mersen FR22GR69V50T Protistor® High-Speed Fuse?
The Mersen FR22GR69V50T is a high-performance Protistor® high-speed cylindrical semiconductor fuse designed to protect sensitive power semiconductor devices in demanding industrial electrical systems. Its full-range gR operating characteristic provides protection against overload and short-circuit currents, helping to reduce damage to valuable power electronics and minimise equipment downtime.
Manufactured in accordance with IEC 60269-1 and IEC 60269-4, the FR22GR69V50T combines rapid fault interruption with an extremely high breaking capacity. Its robust ceramic body and silver-plated copper ferrule terminals provide dependable electrical performance, while the standard 22 × 58 mm cylindrical format allows straightforward installation in compatible fuse clips and holders.
With a rated current of 50 A and a rated voltage of 690 V AC, this fuse is suitable for industrial drives, power converters, inverters, uninterruptible power supplies and other semiconductor-based equipment. The integrated striker indication system provides clear mechanical fuse-status indication and can support remote signalling or switching when used with compatible accessories.
Key Advantages
- High-speed gR fuse designed for power semiconductor protection.
- 50 A current rating for industrial power-electronic equipment.
- 690 V AC IEC rated voltage.
- Integrated striker indication system for rapid fault identification.
- 160 kA breaking capacity for high prospective fault currents.
- Low energy let-through helps protect sensitive semiconductor components.
Key Features
- Mersen Protistor® 22 × 58 gR series.
- 50 A rated current.
- 690 V AC IEC voltage rating.
- gR full-range semiconductor fuse characteristic.
- 160 kA maximum AC breaking capacity.
- Integrated striker-type fuse indication.
- Silver-plated copper ferrule terminals.
- Durable ceramic insulating body.
Reliable Protection for Power Electronics
High-speed semiconductor fuses such as the Mersen FR22GR69V50T interrupt damaging fault currents quickly enough to protect sensitive devices including IGBTs, thyristors, SCRs, diodes and rectifiers. Their low let-through energy helps limit thermal and electrical stress before it can cause extensive damage to semiconductor assemblies.
The gR full-range characteristic allows the fuse to provide protection against both overload and short-circuit conditions. This makes the FR22GR69V50T suitable for critical industrial systems that require dependable circuit protection, rapid maintenance diagnostics and high fault-current interruption capability.
Typical Applications
- Variable frequency drives and motor-control systems.
- Industrial power converters and rectifiers.
- Solar and industrial inverter systems.
- Uninterruptible power supplies.
- Semiconductor protection circuits.
- Industrial automation and control panels.
