Why Choose the Mersen B301324 High-Speed Semiconductor Fuse?
The Mersen B301324 is a Protistor® Size 71 square body high-speed semiconductor fuse engineered to provide comprehensive protection for modern power conversion equipment. Identified by Catalogue Number PC71GB69V250EF, this gR full-range fuse provides both overload and short-circuit protection for sensitive semiconductor devices including IGBTs, thyristors, diodes and rectifiers.
Rated at 250 A and 690 V AC (IEC), the B301324 features an ultra-fast gR characteristic, open slot blade terminals and an integrated striker indicator. Manufactured using precision die-cut pure silver fuse elements embedded in solidified silica sand, it delivers low let-through energy (I²t), excellent cycling capability and a high interrupting capacity for demanding industrial applications.
The Mersen B301324 is ideally suited for industrial drives, UPS systems, renewable energy equipment, power converters and similar power electronic installations requiring reliable full-range semiconductor protection.
Key Advantages
- Full-range gR semiconductor protection for overload and short-circuit faults.
- 250 A current rating for industrial power conversion equipment.
- 690 V AC IEC rated voltage.
- Low I²t minimises damaging fault energy.
- Integrated striker indicator for remote fuse monitoring.
- Open slot blade terminals for secure installation.
- Excellent cycling capability for demanding duty cycles.
- Manufactured by Mersen, a global leader in circuit protection.
Key Features
- Mersen Protistor® Size 71 gR series.
- Catalogue Number: PC71GB69V250EF.
- 250 A rated current.
- 690 V AC IEC rated voltage.
- gR full-range operating characteristic.
- Square body construction.
- Open slot blade terminals.
- Integrated striker indicator.
- Silver-plated contact surfaces.
- High breaking capacity with low let-through energy.
Reliable Full-Range Protection for Power Electronics
Unlike aR semiconductor fuses, gR fuses provide full-range protection, protecting semiconductor devices against both overload and short-circuit conditions. This makes the Mersen B301324 an excellent choice for equipment requiring comprehensive protection while maintaining low energy let-through and fast fault interruption.
Its robust square body design, silver-plated contacts and integrated striker indicator make it suitable for demanding industrial environments where reliability and ease of maintenance are essential.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and rectifiers.
- Industrial inverters.
- UPS and backup power systems.
- Renewable energy systems.
- Battery energy storage systems.
- Industrial automation equipment.
