Why Choose the Mersen J301078 Protistor® High-Speed Semiconductor Fuse?
The Mersen J301078 is a premium Protistor® Size 33 aR square body high-speed semiconductor fuse designed to provide exceptional protection for modern power conversion equipment. Specifically engineered for safeguarding sensitive semiconductor devices, it delivers ultra-fast fault interruption and outstanding current limiting to protect IGBTs, thyristors, rectifiers and power diodes against damaging short-circuit currents.
Manufactured as part of Mersen's globally recognised Protistor® semiconductor fuse range, the J301078 features die-cut silver fuse elements embedded in solidified sand, silver-plated contact surfaces, long slotted blade terminals and an integrated striker for remote indication. This robust construction provides excellent cycling capability, low let-through energy and dependable protection in demanding industrial environments.
With a 2000 A rated current, 550 V AC IEC and 600 V AC UL voltage ratings, the J301078 is ideally suited to industrial drives, converters, rectifiers, UPS systems, renewable energy equipment and other high-power semiconductor applications requiring reliable circuit protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 2000 A current rating for high-power industrial applications.
- 550 V AC IEC / 600 V AC UL voltage rating.
- Excellent current-limiting performance reduces fault energy.
- Integrated striker for remote indication and monitoring.
- Designed to maximise semiconductor reliability and minimise downtime.
Key Features
- Mersen Protistor® Size 33 aR series.
- 2000 A rated current.
- 550 V AC (IEC) / 600 V AC (UL) rated voltage.
- Square body fuse with long slotted blade terminals.
- Integrated striker indicator.
- Silver-plated contact surfaces.
- Solidified sand construction for controlled arc performance.
- Designed for protection of IGBTs, SCRs, rectifiers and power diodes.
Reliable Protection for Industrial Power Electronics
High-speed semiconductor fuses are engineered to interrupt fault currents before excessive thermal or electrical energy reaches sensitive semiconductor devices. Their low let-through energy helps improve equipment reliability while reducing maintenance costs and unplanned downtime.
The Mersen Protistor® Size 33 range is trusted worldwide by OEMs, panel builders and industrial engineers for demanding power conversion applications where dependable semiconductor protection is essential.
Typical Applications
- Variable frequency drives.
- Industrial motor control systems.
- Power converters and rectifiers.
- Industrial inverter systems.
- UPS systems.
- Renewable energy installations.
- Battery energy storage systems.
- Industrial power supplies.
