Why Choose the Mersen J301906 Protistor® High-Speed Semiconductor Fuse?
The Mersen J301906 is a Protistor® Size 70 aR square body high-speed semiconductor fuse engineered to provide superior protection for sensitive semiconductor devices operating in demanding industrial power conversion systems. Designed for rapid fault interruption, it minimises let-through energy during short-circuit conditions, helping to protect expensive power electronic components and maximise equipment uptime.
Manufactured using pure silver fuse elements embedded in solidified sand with silver-plated contact surfaces, the J301906 delivers excellent current-limiting performance and high interrupting capacity. It incorporates a low-voltage striker indicator that can operate an optional microswitch for remote status indication, making maintenance faster and improving system monitoring.
With a 50 A rated current, 1250 V AC IEC / 1300 V AC UL voltage rating, bolted DIN 110 blade terminals and a Size 70 square body, the J301906 is ideally suited to rectifiers, variable speed drives, inverters, UPS systems and other industrial power conversion equipment.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 50 A current rating.
- 1250 V AC IEC / 1300 V AC UL voltage rating.
- High interrupting capacity with excellent current limitation.
- Low I²t reduces stress on semiconductor devices.
- Integrated striker indicator for remote monitoring.
- Suitable for demanding industrial power conversion applications.
Key Features
- Mersen Protistor® Size 70 semiconductor fuse.
- aR ultra-fast protection characteristic.
- Square body ceramic construction.
- Bolted DIN 110 blade terminals.
- Pure silver fuse elements.
- Silver-plated contact surfaces.
- Solidified sand arc-quenching technology.
- Low-voltage striker indication.
- RoHS compliant.
Designed for Modern Power Electronics
The Mersen J301906 has been specifically developed to protect modern semiconductor devices including SCRs, thyristors, diodes, GTOs and IGBTs. Its ultra-fast operating characteristics minimise damage during short-circuit events while maintaining excellent cycling capability for demanding industrial environments.
Protistor® semiconductor fuses are trusted by equipment manufacturers worldwide for use in high-performance power conversion systems where dependable semiconductor protection is essential.
Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Rectifiers.
- Power converters.
- Industrial inverters.
- UPS systems.
- Reduced-voltage motor starters.
- Renewable energy converters.
- Industrial power supplies.
- Battery energy storage systems.
