Why Choose the Mersen A300081 Protistor® High-Speed Fuse?
The Mersen A300081 (PC33UD69V900TF) is a premium Protistor® square body high-speed semiconductor fuse engineered to provide ultra-fast short-circuit protection for sensitive power electronic equipment. Featuring an aR operating characteristic, this fuse is specifically designed to protect IGBTs, thyristors, SCRs and diodes used in demanding industrial power conversion systems.
Part of the renowned Mersen Protistor® Size 33 series, the A300081 combines high interrupting capacity, low let-through energy and rugged construction to help minimise equipment damage and reduce costly downtime. Silver-plated contact surfaces, solidified sand technology and an integrated striker indicator ensure reliable operation in demanding industrial environments.
With a 900 A current rating and a 690 V AC IEC / 700 V AC UL voltage rating, the A300081 is ideally suited for variable speed drives, UPS systems, industrial converters, renewable energy equipment and high-power automation installations requiring dependable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 900 A rated current for high-power industrial applications.
- 690 V AC IEC / 700 V AC UL voltage rating.
- 200 kA breaking capacity provides outstanding fault interruption.
- Integrated striker indicator for convenient maintenance.
- Silver-plated contacts for excellent electrical performance.
Key Features
- Mersen Protistor® Size 33 semiconductor fuse.
- Catalogue number: PC33UD69V900TF.
- Item number: A300081.
- 900 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR operating characteristic.
- Flush-end metric threaded terminals.
- Integrated striker indicator.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are designed to interrupt fault currents before excessive energy reaches expensive semiconductor devices. Their ultra-fast operation helps improve equipment reliability, reduce maintenance costs and maximise system availability.
The Mersen Protistor® Size 33 range is trusted by OEMs and industrial engineers worldwide for protecting power converters, motor drives, UPS systems and renewable energy equipment operating in demanding environments.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and rectifiers.
- UPS systems.
- Renewable energy inverters.
- Industrial automation and power distribution equipment.
