Why Choose the Mersen A300035 Protistor® High-Speed Fuse?
The Mersen A300035 (A070UD31KI630) is a premium Protistor® square body high-speed semiconductor fuse engineered to provide ultra-fast protection for sensitive power electronic equipment. Featuring an aR operating characteristic, this fuse is specifically designed to protect IGBTs, thyristors, SCRs and diodes against damaging short-circuit faults in demanding industrial applications.
As part of the trusted Mersen Protistor® Size 31 series, the A300035 combines high interrupting capacity, low let-through energy and robust construction to maximise equipment protection while reducing downtime. Silver-plated contacts, solidified sand technology and an integrated striker indicator ensure dependable long-term performance in industrial environments.
With a 630 A current rating and a 690 V AC IEC / 700 V AC UL voltage rating, the A300035 is ideally suited to variable speed drives, UPS systems, industrial converters, renewable energy equipment and high-power automation systems requiring reliable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 630 A rated current for high-power industrial equipment.
- 690 V AC IEC / 700 V AC UL rated voltage.
- 200 kA breaking capacity provides dependable fault interruption.
- Integrated striker indicator for convenient fuse monitoring.
- Silver-plated blade contacts ensure excellent electrical conductivity.
Key Features
- Mersen Protistor® Size 31 semiconductor fuse.
- Catalogue number: A070UD31KI630.
- Item number: A300035.
- 630 A rated current.
- 690 V AC IEC / 700 V AC UL operation.
- aR operating characteristic.
- DIN 80 slotted short blade terminals.
- Integrated mechanical striker indicator.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are designed to interrupt fault currents before excessive energy can damage expensive semiconductor devices. Their ultra-fast operation helps protect critical equipment, extend service life and reduce maintenance costs.
The Protistor® Size 31 range is widely specified by OEMs and industrial engineers for protecting power converters, motor drives, UPS systems and renewable energy installations where reliable 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.
