Why Choose the Mersen N300507 Protistor® High-Speed Fuse?
The Mersen N300507, catalogue number PC73UD13C500TF, is a Protistor® Size 73 square body high-speed semiconductor protection fuse engineered to provide maximum protection for modern power electronic equipment. Featuring an ultra-fast aR operating characteristic, it is specifically designed to protect IGBTs, thyristors, diodes and other semiconductor devices against damaging short-circuit faults.
Rated at 500 A, with a 1250 V AC IEC and 1300 V AC UL voltage rating, the N300507 delivers outstanding current-limiting performance and a high interrupting capacity. The fuse incorporates die-cut silver fuse elements embedded in solidified sand, reducing let-through energy (I²t) and improving protection for valuable semiconductor components.
The fuse features flush-end metric threaded terminals, silver-plated contacts and an integrated striker indicator for remote status indication using compatible microswitch accessories. It is ideally suited for industrial drives, renewable energy systems, UPS equipment and other demanding power conversion applications.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 500 A continuous current rating.
- 1250 V AC IEC / 1300 V AC UL voltage rating.
- Protects IGBTs, thyristors, SCRs and power semiconductor devices.
- Integrated striker indicator for remote fuse monitoring.
- Low I²t minimises damage during short-circuit faults.
- Silver-plated contact surfaces for reliable conductivity.
- Designed for demanding industrial power conversion systems.
Key Features
- Mersen Protistor® Size 73 series.
- Catalogue number PC73UD13C500TF.
- 500 A rated current.
- 1250 V AC IEC / 1300 V AC UL.
- aR ultra-fast operating characteristic.
- Flush-end metric threaded terminals.
- Silver-plated contacts.
- Integrated striker indicator.
- RoHS compliant.
Engineered for High-Power Semiconductor Protection
The Protistor® Size 73 range is designed to protect today's high-power semiconductor equipment by interrupting fault currents before excessive thermal energy can damage expensive electronic components. Its advanced construction delivers excellent current limitation, low energy let-through and dependable long-term performance.
The Mersen N300507 is widely specified by OEMs, panel builders and maintenance engineers protecting high-voltage drives, renewable energy converters, UPS systems and industrial power conversion equipment.
Typical Applications
- High-voltage variable frequency drives.
- Industrial power converters.
- Renewable energy inverters.
- UPS systems.
- Battery energy storage systems.
- Industrial motor drives.
- Traction and transportation equipment.
- Semiconductor protection installations.
