Why Choose the Mersen W301319 Protistor® High-Speed Fuse?
The Mersen W301319 is a genuine Protistor® square body high-speed semiconductor fuse designed to provide fast and reliable protection for sensitive power electronic equipment. Manufactured by Mersen, this 400 A, 690 V AC gR fuse is specifically engineered to protect semiconductor devices from both overloads and short-circuit faults in demanding industrial applications.
As part of the renowned Protistor® Size 71 gR series, the W301319 combines low let-through energy (I²t), high breaking capacity and excellent cycling performance to maximise equipment protection while helping minimise downtime. Its robust square body construction and silver-plated contacts ensure dependable operation in harsh industrial environments.
Featuring a 400 A current rating, 690 V AC IEC rating and flush metric threaded terminals with striker indication, the W301319 is ideally suited to protecting semiconductor devices used within inverters, variable speed drives, UPS systems and other power conversion equipment.
Key Advantages
- High-speed gR semiconductor protection fuse.
- 400 A current rating for demanding industrial applications.
- 690 V AC IEC voltage rating.
- Provides full-range protection against overloads and short circuits.
- Low I²t minimises damage to sensitive semiconductor devices.
- High interrupting capacity for reliable fault protection.
Key Features
- Mersen Protistor® Size 71 gR series.
- Part number: W301319.
- Catalogue number: PC71GB69V400TF.
- 400 A rated current.
- 690 V AC IEC rated voltage.
- Square body high-speed semiconductor fuse.
- Flush metric threaded terminals.
- Integrated striker indication.
- Silver-plated contact surfaces.
- Rated breaking capacity of 150 kA AC.
- RoHS compliant.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are specifically designed to protect expensive power electronic devices by interrupting fault currents before excessive thermal energy can damage semiconductors. Their low let-through energy significantly reduces stress on IGBTs, thyristors, diodes and similar components used throughout industrial power conversion equipment.
The Mersen Protistor® range is widely used in industrial automation, renewable energy, motor drives and UPS installations where dependable semiconductor protection is critical to maintaining system availability and reducing costly equipment failures.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial inverters.
- UPS systems.
- Power conversion equipment.
- Semiconductor protection circuits.
- Industrial automation and motor control systems.
