Why Choose the Mersen A300173 Protistor® High-Speed Fuse?
The Mersen A300173 (PC32UD69V700EF) 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, it is specifically designed to protect IGBTs, thyristors, SCRs and diodes used in demanding industrial power conversion systems.
As part of the trusted Mersen Protistor® Size 32 series, the A300173 combines high interrupting capacity, low let-through energy and robust ceramic construction to minimise equipment damage during fault conditions. Silver-plated contacts, solidified sand technology and an integrated striker indicator provide dependable long-term performance in demanding industrial environments.
With a 700 A current rating and a 690 V AC IEC / 700 V AC UL voltage rating, the A300173 is ideally suited for variable frequency drives, UPS systems, industrial converters, renewable energy equipment and high-power automation installations requiring reliable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 700 A rated current for demanding industrial applications.
- 690 V AC IEC / 700 V AC UL rated voltage.
- 200 kA breaking capacity for dependable fault interruption.
- Integrated striker indicator for easy maintenance.
- Silver-plated open slot blade terminals for excellent electrical conductivity.
Key Features
- Mersen Protistor® Size 32 semiconductor fuse.
- Catalogue number: PC32UD69V700EF.
- Item number: A300173.
- 700 A rated current.
- 690 V AC IEC / 700 V AC UL voltage rating.
- aR operating characteristic.
- Open slot blade terminals with striker indicator.
- Designed for protecting IGBTs, thyristors, SCRs and diodes.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are engineered to interrupt fault currents before damaging energy reaches expensive semiconductor devices. Their ultra-fast operation helps improve equipment reliability, reduce maintenance costs and maximise system availability.
The Mersen Protistor® Size 32 range is trusted by OEMs and industrial engineers worldwide for protecting motor drives, UPS systems, renewable energy equipment and industrial power conversion systems where dependable semiconductor protection is essential.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and rectifiers.
- UPS systems.
- Renewable energy inverters.
- Industrial automation and power distribution equipment.
