Why Choose the Mersen FR22AR69V50T Protistor® Semiconductor Fuse?
The Mersen FR22AR69V50T, also identified by item number E1056670, is a high-speed Protistor® cylindrical semiconductor fuse designed to protect sensitive power semiconductor devices against damaging short-circuit currents. Part of the Mersen Protistor® 22 × 58 mm aR series, it provides rapid fault interruption for industrial power electronic systems operating at up to 690 V AC.
With a 50 A current rating, an aR operating characteristic and a high 160 kA breaking capacity, the FR22AR69V50T is ideally suited to protecting IGBTs, thyristors, diodes and rectifier modules used in variable frequency drives, UPS systems, industrial inverters and power conversion equipment.
The integrated striker indicator provides clear blown-fuse signalling for faster maintenance and remote indication when used with compatible accessories. Its compact 22 × 58 mm cylindrical construction allows installation in compatible fuse holders for demanding industrial applications.
Key Advantages
- High-speed semiconductor protection fuse.
- 50 A rated current for industrial power electronics.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR operating characteristic for semiconductor short-circuit protection.
- Integrated striker indicator for rapid fault identification.
- 160 kA breaking capacity.
- Low let-through energy helps minimise semiconductor damage.
- Compact 22 × 58 mm cylindrical format.
Key Features
- Mersen Protistor® 22 × 58 mm aR series.
- 50 A rated current.
- 690 V AC IEC / 700 V AC UL.
- aR partial-range semiconductor protection.
- 160 kA AC breaking capacity.
- 217.6 A²s pre-arcing I²t.
- 1850 A²s clearing I²t.
- Integrated striker indication.
- Ceramic cylindrical construction.
- Silver-plated copper ferrule terminals.
Reliable Protection for Industrial Power Electronics
The Mersen FR22AR69V50T is engineered to interrupt high fault currents before excessive thermal energy can damage expensive semiconductor components. Its low I²t values and current-limiting performance help improve equipment reliability while reducing maintenance costs and production downtime.
The aR operating characteristic provides dedicated short-circuit protection for semiconductor devices. Overload protection should be provided separately, making this fuse ideal for industrial drives, converters, UPS systems and automation equipment.
Typical Applications
- Variable frequency drives.
- Industrial motor drives.
- Power converters and rectifiers.
- UPS systems.
- Renewable energy inverters.
- Semiconductor protection circuits.
- Industrial automation equipment.
- Power electronic assemblies.
