Why Choose the Mersen E300085 Protistor® High Speed Fuse?
The Mersen E300085, catalogue number PC33UD69V1400TF, is a premium square body high speed semiconductor fuse developed to provide exceptional protection for modern power electronic equipment. As part of the renowned Mersen Protistor® Size 33 series, this fuse is engineered to safeguard sensitive semiconductor devices including IGBTs, thyristors and diodes against damaging short circuits and fault currents.
Designed for demanding industrial applications, the E300085 combines ultra-fast fault interruption with excellent current limiting performance to minimise let-through energy and help protect expensive equipment. Its silver-plated contacts, reinforced terminals and solidified sand construction deliver dependable long-term performance even in harsh operating environments.
With a 1400 A current rating and 690 V AC IEC / 700 V AC UL voltage rating, the Mersen E300085 is ideally suited for high-power drives, converters, UPS systems, renewable energy installations and industrial automation equipment requiring reliable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 1400 A current rating for high-power industrial applications.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Excellent protection for IGBTs, thyristors and diode modules.
- Low let-through energy helps reduce equipment damage.
- Robust square body construction with reinforced terminals.
Key Features
- Mersen Protistor® Size 33 series.
- 1400 A rated current.
- 690 V AC IEC / 700 V AC UL voltage rating.
- aR ultra-fast operating characteristic.
- Square body design with flush ends and metric threaded mounting.
- Integrated striker indicator for fuse status indication.
- Silver-plated contact surfaces.
- Designed specifically for semiconductor protection.
Reliable Protection for High Power Electronics
High speed semiconductor fuses are designed to interrupt excessive fault currents before damage can occur to sensitive electronic components. The Mersen Protistor® range provides exceptionally fast operation with low I²t values, helping maximise equipment reliability while reducing maintenance costs in demanding industrial applications.
The E300085 is widely used wherever high-performance semiconductor protection is required, delivering reliable operation in motor drives, renewable energy systems, industrial converters and heavy-duty power electronics.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor control systems.
- Power converters and rectifiers.
- UPS and backup power equipment.
- Renewable energy inverter systems.
- Heavy industrial automation and manufacturing equipment.
