Why Choose the Mersen M221133 High-Speed Semiconductor Fuse?
The Mersen M221133 is a high-performance Protistor® high-speed cylindrical fuse-link designed to protect sensitive power semiconductor devices against damaging overloads and short-circuit currents. Identified by catalogue number FD22GB44V63T, it forms part of Mersen’s 22 × 58 mm gLB range developed for dependable protection in DC power applications.
This fuse-link combines rapid fault interruption with a full-range gLB operating characteristic, enabling it to protect against both overloads and high-level fault currents. Its fast response helps limit the electrical and thermal energy reaching sensitive components such as rectifiers, thyristors, diodes and power conversion assemblies.
With a rated current of 63 A, an IEC voltage rating of 440 V DC and a compact 22 × 58 mm cylindrical format, the Mersen M221133 is suitable for industrial converters, DC power supplies, uninterruptible power systems and railway auxiliary circuits. Its integrated striker provides clear fuse-operation indication for easier inspection and maintenance.
Key Advantages
- High-speed fuse-link designed for power semiconductor protection.
- 63 A rated current for industrial DC circuits.
- 440 V DC IEC voltage rating.
- gLB characteristic provides overload and short-circuit protection.
- High interrupting performance supports dependable fault clearance.
- Integrated mechanical striker simplifies fuse-status identification.
Key Features
- Mersen Protistor® semiconductor fuse range.
- FD22GB44V63T catalogue number.
- 63 A rated current.
- 440 V DC rated voltage.
- gLB high-speed semiconductor protection characteristic.
- Compact 22 × 58 mm cylindrical fuse-link design.
- Integrated mechanical striker indication.
- Designed for compatible cylindrical fuse holders and clips.
- Suitable for sensitive DC power electronic equipment.
- RoHS-compliant construction.
Reliable Protection for DC Power Electronics
Power semiconductor devices can be permanently damaged by overloads and short-circuit currents that develop within a fraction of a second. High-speed fuse-links such as the Mersen M221133 interrupt these faults rapidly, helping limit the energy reaching sensitive electronic components.
The Mersen Protistor® 22 × 58 gLB range is engineered for DC installations requiring dependable full-range protection. Its compact cylindrical construction, high interrupting performance and integrated striker make it suitable for modern power conversion, automation and transportation equipment.
Typical Applications
- Industrial rectifiers and converters.
- Power inverters.
- DC power supplies.
- Uninterruptible power supply systems.
- Railway auxiliary power circuits.
- Power semiconductor protection circuits.
