Why Choose the Mersen G300708 Protistor® High-Speed Fuse?
The Mersen G300708 (A070UD30TTI125) is a premium square body high-speed semiconductor fuse designed to provide exceptional protection for modern power electronic equipment. Part of the trusted Mersen Protistor® Size 30 aR series, it is engineered to safeguard sensitive semiconductor devices including IGBTs, MOSFETs, thyristors and diodes against damaging short-circuit currents.
Its ultra-fast aR operating characteristic rapidly interrupts fault currents, limiting thermal and electrical stress on valuable semiconductor components. Manufactured using die-cut fuse elements embedded in solidified sand with silver-plated contact surfaces, the fuse delivers low let-through energy, high breaking capacity and dependable long-term performance in demanding industrial environments.
With a 125 A current rating, 690 V AC IEC / 700 V AC UL voltage rating and an integrated striker indicator, the G300708 is ideally suited for variable frequency drives, UPS systems, industrial inverters, converters and renewable energy applications requiring reliable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 125 A current rating for industrial power electronic equipment.
- 690 V AC IEC and 700 V AC UL voltage ratings.
- Protects IGBTs, MOSFETs, thyristors and diodes.
- Integrated striker indicator for fuse status indication.
- High breaking capacity with low let-through energy for maximum semiconductor protection.
Key Features
- Mersen Protistor® Size 30 aR series.
- Catalogue number: A070UD30TTI125.
- 125 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- Square body fuse with flush ends and UNC threaded terminals.
- Integrated striker indication system.
- Silver-plated brass terminals for excellent electrical conductivity.
- Designed specifically for semiconductor short-circuit protection.
Reliable Protection for Industrial Power Electronics
High-speed semiconductor fuses are designed to interrupt fault currents before excessive energy reaches sensitive electronic components. Their rapid operation significantly reduces thermal stress, helping extend the service life of semiconductor devices while reducing maintenance costs and equipment downtime.
The Protistor® range is widely used throughout industrial automation, renewable energy and power conversion industries where reliable protection of expensive semiconductor assemblies is essential for maintaining operational continuity.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and inverters.
- UPS and backup power systems.
- Renewable energy equipment.
- Protection of IGBT, MOSFET, SCR and diode modules.
