Why Choose the Mersen F301282 Protistor® High-Speed Fuse?
The Mersen F301282 (catalogue number PC70GB69V100TF) is a premium Protistor® Size 70 gR square body high-speed semiconductor protection fuse engineered to provide full-range protection for power semiconductor equipment. Unlike aR fuses, the gR operating class provides protection against both overloads and short-circuit faults, making it suitable for complete semiconductor protection in demanding industrial applications.
Manufactured using pure silver fuse elements embedded in solidified sand, the F301282 delivers extremely low let-through energy (I²t), high interrupting capacity and excellent thermal cycling performance. Silver-plated contacts and non-magnetic hardware further enhance reliability, while the integrated striker indicator enables remote fuse status indication when used with an optional microswitch.
With a 100 A current rating, 690 V AC IEC voltage rating and 150 kA breaking capacity, the Mersen F301282 is ideally suited to industrial drives, converters, UPS systems, renewable energy installations and other demanding power conversion equipment.
Key Advantages
- Full-range gR semiconductor protection against overloads and short circuits.
- 100 A current rating for industrial power electronic applications.
- 690 V AC IEC rated voltage.
- 150 kA breaking capacity.
- Integrated striker indicator for remote status indication.
- Very low I²t improves semiconductor protection.
- Silver-plated contacts provide excellent conductivity and long service life.
Key Features
- Mersen Protistor® Size 70 gR series.
- 100 A rated current.
- 690 V AC IEC voltage rating.
- gR full-range semiconductor protection.
- Square body ceramic construction.
- Flush-end ISO metric threaded terminals.
- Integrated striker indication.
- Low I²t and excellent cycling capability.
Complete Semiconductor Protection
The Mersen F301282 has been developed to provide comprehensive protection for semiconductor equipment by clearing both overload and short-circuit faults. Its current-limiting design significantly reduces the electrical and thermal energy reaching sensitive power electronic devices, helping maximise equipment reliability and minimise downtime.
Protistor® gR fuses are widely specified by OEMs and electrical engineers for industrial power conversion systems where dependable full-range semiconductor protection is essential.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters.
- Rectifier systems.
- Renewable energy inverters.
- UPS systems.
- Industrial automation equipment.
- Protection of IGBTs, thyristors and diode modules.
