Why Choose the Mersen Q300555 Protistor® High-Speed Fuse?
The Mersen Q300555 (PC72UD13C315D1A) is a premium square body semiconductor protection fuse designed to provide ultra-fast protection for sensitive power electronic equipment. Part of the trusted Mersen Protistor® Size 72 series, this aR high-speed fuse delivers exceptional protection for IGBTs, thyristors, diodes and other semiconductor devices used in industrial power conversion systems.
Engineered for demanding industrial environments, the Q300555 offers excellent current limitation and low let-through energy to reduce damage caused by short-circuit faults. Its ceramic body, silver-plated contacts and integrated striker indicator provide long-term reliability, making it an ideal choice for OEMs, panel builders and maintenance engineers.
With a rated current of 315 A and a 1250 V AC IEC / 1300 V AC UL voltage rating, this fuse is perfectly suited for protecting high-power drives, inverters, UPS systems, renewable energy installations and industrial power converters.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 315 A current rating for demanding power electronic applications.
- 1250 V AC IEC / 1300 V AC UL voltage rating.
- Designed to protect IGBTs, thyristors and power semiconductors.
- Very low I²t minimises damage during fault conditions.
- Integrated striker indicator for convenient fuse status monitoring.
Key Features
- Mersen Protistor® Size 72 series.
- Catalogue number: PC72UD13C315D1A.
- 315 A rated current.
- 1250 V AC IEC / 1300 V AC UL.
- Ultra-fast aR operating characteristic.
- DIN 110 blade terminals with bolted mounting.
- Silver-plated copper connections.
- Ceramic square body with integrated striker indicator.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are specifically engineered to interrupt fault currents before expensive semiconductor devices can be damaged. Their ultra-fast response and exceptionally low let-through energy provide superior protection compared with conventional industrial fuses, helping maximise equipment reliability and minimise downtime.
The Protistor® range from Mersen is trusted globally across industrial automation, renewable energy, UPS installations and variable speed drives where dependable semiconductor protection is critical for safe and efficient operation.
Typical Applications
- Variable speed drives (VSDs).
- Industrial motor drives.
- Power electronic converters and inverters.
- UPS and backup power systems.
- Solar and renewable energy installations.
- Industrial power distribution and semiconductor protection.
