Why Choose the Mersen E221448 FR27GB80V110T Protistor® Semiconductor Fuse?
The Mersen E221448, catalogue number FR27GB80V110T, is a high-speed cylindrical Protistor® semiconductor fuse designed to protect sensitive power electronic equipment from overloads and semiconductor fault currents. Part of Mersen’s 27 × 60 mm gR (gRB) series, it provides full-range protection for industrial systems operating at up to 800 V AC.
With a rated current of 110 A, an ultra-fast gR operating characteristic and a 90 kA AC breaking capacity, the E221448 is suitable for protecting IGBTs, thyristors, diodes, rectifiers and other semiconductor components used in motor drives, UPS systems, inverters and compact power converters.
The fuse incorporates an integrated striker indicator for straightforward fault identification and compatibility with suitable remote signalling accessories. Its die-cut fuse elements are embedded in solidified sand to control arcing, reduce let-through energy and support reliable interruption of severe electrical faults.
Key Advantages
- High-speed protection for sensitive power semiconductor devices.
- 110 A current rating for demanding power-electronic circuits.
- 800 V AC IEC rated voltage.
- gR full-range characteristic for overload and short-circuit protection.
- 90 kA AC breaking capacity.
- Integrated striker indicator supports rapid fault identification.
- Low let-through energy helps minimise damage to semiconductor components.
- Compact cylindrical design for compatible fuse holders and mounting clips.
Key Features
- Mersen Protistor® 27 × 60 mm gR (gRB) series.
- 110 A rated current.
- 800 V AC IEC rated voltage.
- gR full-range semiconductor protection.
- 90 kA AC interrupting rating.
- 26,500 A²s clearing I²t at rated voltage.
- 14 W power dissipation at rated current.
- Integrated striker indication system.
- Silver-plated copper ferrule terminals.
- Durable ceramic insulating body.
Full-Range Protection for Industrial Power Electronics
The Mersen E221448 uses an extremely fast-acting gR fuse characteristic to provide full-range protection against both overload currents and semiconductor fault currents. This makes it suitable for circuits where the fuse must protect sensitive electronic devices throughout the complete operating range rather than only during severe short circuits.
Its internal fuse elements are embedded in compacted sand, helping to control electrical arcing during operation. This construction provides low I²t performance, strong current limitation and dependable interruption while reducing the thermal and mechanical stress imposed on connected equipment.
Typical Applications
- Small industrial inverters.
- Variable frequency drives.
- Industrial motor-drive systems.
- Uninterruptible power supplies.
- Power converters and rectifiers.
- Industrial automation equipment.
- Semiconductor protection circuits.
- Power-electronic equipment rated at 800 V AC or below.
