Why Choose the Mersen W300077 Protistor® Fuse?
The Mersen W300077 is a high-performance Protistor® ultra-fast semiconductor fuse engineered to provide exceptional protection for sensitive power electronic equipment. Designed for demanding industrial applications, this square body fuse delivers rapid fault interruption to protect semiconductor devices including IGBTs, MOSFETs, thyristors and diodes against damaging short-circuit currents.
Manufactured by Mersen, a global leader in electrical protection technology, the W300077 combines outstanding current limiting performance with high breaking capacity to minimise equipment damage and maximise operational reliability. Its robust construction and silver-plated contacts ensure dependable long-term performance in industrial environments.
With a 200 A current rating, 690 V AC IEC / 700 V AC UL voltage rating and an aR ultra-fast protection characteristic, the W300077 is ideally suited for protecting variable speed drives, industrial converters, UPS systems, renewable energy inverters and other power conversion equipment.
Key Advantages
- Ultra-fast Protistor® semiconductor protection fuse.
- 200 A current rating for industrial power electronics.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR characteristic specifically designed for semiconductor protection.
- High interrupting capacity reduces equipment damage during faults.
- Excellent current limiting performance.
- Suitable for industrial drives, converters and renewable energy systems.
Key Features
- Manufacturer: Mersen
- Series: Protistor® Size 30
- Model: W300077
- Square body high-speed semiconductor fuse.
- 200 A rated current.
- 690 V AC IEC / 700 V AC UL voltage rating.
- aR ultra-fast protection characteristic.
- Integrated striker indicator.
- Flush ends with metric threaded connections.
- Silver-plated contact surfaces.
- Designed for protecting IGBTs, MOSFETs, thyristors and diodes.
Reliable Protection for Industrial Power Electronics
Ultra-fast semiconductor fuses are designed to disconnect fault currents before excessive thermal energy can damage expensive semiconductor devices. Their rapid response improves equipment reliability, reduces maintenance costs and helps minimise production downtime.
The Mersen Protistor® range is widely trusted across industrial automation, renewable energy, transportation and power conversion industries where dependable semiconductor protection is essential for safe and efficient operation.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters.
- UPS systems.
- Renewable energy inverters.
- Industrial rectifiers.
- Soft starters.
- Semiconductor protection circuits.
