Why Choose the Mersen A300012 Protistor® High-Speed Fuse?
The Mersen A300012 (PC31UD69V315A) is a premium Protistor® square body high-speed semiconductor fuse designed to provide ultra-fast short-circuit protection for sensitive power electronic equipment. Featuring an aR operating characteristic, it is specifically engineered to protect semiconductor devices including IGBTs, thyristors, SCRs and diodes used in modern industrial power conversion systems.
Manufactured by Mersen, this fuse combines high interrupting capacity, low let-through energy and robust construction to minimise equipment damage during fault conditions. Silver-plated contacts, solidified sand technology and an integrated striker indicator ensure dependable performance in demanding industrial environments.
Rated at 315 A with a 690 V AC IEC / 700 V AC UL voltage rating, the A300012 is ideally suited for variable speed drives, UPS systems, power converters, renewable energy equipment and industrial automation installations requiring reliable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 315 A current rating for high-power industrial applications.
- 690 V AC IEC / 700 V AC UL voltage rating.
- High 200 kA breaking capacity for dependable fault protection.
- Integrated striker indicator for easy status monitoring.
- Silver-plated DIN 80 blade contacts for reliable electrical performance.
Key Features
- Mersen Protistor® Size 31 semiconductor fuse.
- Catalogue number: PC31UD69V315A.
- Item number: A300012.
- 315 A rated current.
- 690 V AC IEC / 700 V AC UL.
- aR operating characteristic.
- DIN 80 bolted blade terminals.
- Integrated striker indicator.
Reliable Semiconductor Protection
High-speed semiconductor fuses are engineered to interrupt fault currents before excessive energy reaches sensitive electronic components. Their ultra-fast operating characteristics help protect expensive power semiconductors, reduce repair costs and maximise equipment availability.
The Mersen Protistor® range is trusted worldwide for protecting industrial power converters, motor drives, UPS installations and renewable energy systems where high-performance semiconductor protection is critical.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and rectifiers.
- UPS systems.
- Renewable energy inverters.
- Industrial automation and power distribution equipment.
