Why Choose the Mersen E300706 Protistor® High-Speed Fuse?
The Mersen E300706, catalogue number A070UD31LI700, is a premium square body high-speed semiconductor fuse engineered to provide ultra-fast protection for today's power electronic equipment. As part of the trusted Mersen Protistor® Size 31 series, this fuse is specifically designed to protect IGBTs, thyristors, diodes and other semiconductor devices against damaging short circuits and fault currents. Featuring long slotted blade terminals with an integrated striker indicator, it delivers reliable performance in demanding industrial environments.
Manufactured using precision die-cut fuse elements embedded in solidified silica sand, together with silver-plated contact surfaces and non-magnetic hardware, the E300706 provides exceptionally low let-through energy (I²t) and excellent current-limiting performance. This advanced construction helps minimise damage to expensive semiconductor devices while improving system reliability and reducing costly downtime.
With a 700 A current rating, 690 V AC IEC rating and 700 V AC UL rating, the Mersen E300706 is ideally suited for variable frequency drives, UPS systems, renewable energy inverters, industrial power converters, rectifiers and automation equipment requiring dependable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 700 A current rating for demanding industrial applications.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Protects IGBTs, thyristors and diode modules from short-circuit faults.
- Low I²t characteristics minimise semiconductor damage.
- Long slotted blade terminals for secure bolted installation.
Key Features
- Mersen Protistor® Size 31 series.
- 700 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR ultra-fast operating characteristic.
- Long slotted blade terminals.
- Integrated striker indicator for remote fuse monitoring.
- 200 kA AC breaking capacity.
- Silver-plated contacts with non-magnetic hardware.
- RoHS compliant.
Reliable Protection for Industrial Power Electronics
High-speed semiconductor fuses are engineered to interrupt fault currents before sensitive power semiconductors can be damaged. The Mersen Protistor® Size 31 range delivers extremely fast fault interruption with low I²t values, making it ideal for protecting variable speed drives, renewable energy systems, UPS equipment and industrial power converters while improving reliability and reducing maintenance costs.
The E300706 is widely used in industrial motor drives, renewable energy inverter systems, battery energy storage systems (BESS), UPS installations, rectifiers and automation equipment where dependable semiconductor protection is essential.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor control systems.
- Renewable energy inverter systems.
- Battery energy storage systems (BESS).
- Power converters and rectifiers.
- UPS and standby power systems.
- Industrial automation and OEM machinery.
