Why Choose the Mersen E300177 Protistor® High Speed Fuse?
The Mersen E300177, catalogue number PC32UD69V400A, is a premium square body high speed semiconductor fuse engineered to deliver ultra-fast protection for sensitive power electronic equipment. As part of the proven Mersen Protistor® Size 32 series, it is specifically designed to protect IGBTs, thyristors, diodes and other semiconductor devices from damaging short circuits and fault currents.
Designed for demanding industrial environments, the E300177 offers exceptional current limiting performance with low let-through energy to help minimise damage to expensive equipment. Precision die-cut fuse elements embedded in solidified sand, together with silver-plated contact surfaces and non-magnetic hardware, provide dependable long-term protection for modern power conversion systems.
With a 400 A current rating and a 690 V AC IEC / 700 V AC UL voltage rating, the Mersen E300177 is ideally suited to variable frequency drives, UPS systems, converters, renewable energy installations and industrial automation equipment where reliable semiconductor protection is essential.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 400 A current rating for demanding industrial applications.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Protects IGBTs, thyristors and diode modules.
- Low I²t characteristics reduce damage during short-circuit faults.
- Silver-plated contacts provide excellent conductivity and long service life.
Key Features
- Mersen Protistor® Size 32 series.
- 400 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR ultra-fast operating characteristic.
- Square body fuse with DIN 80 blade terminals.
- Integrated striker indicator for remote status indication.
- 200 kA breaking capacity.
- RoHS compliant construction.
Reliable Protection for Industrial Power Electronics
High speed semiconductor fuses are designed to interrupt fault currents before expensive power electronic components can be damaged. The Mersen Protistor® range delivers exceptionally fast fault clearing with low I²t values, helping maximise equipment reliability while reducing costly downtime.
The E300177 is widely used in industrial motor drives, power converters and automation systems, providing dependable protection for critical semiconductor devices operating in demanding industrial environments.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor control systems.
- Power converters and rectifiers.
- UPS and standby power systems.
- Renewable energy inverter systems.
- Industrial automation and OEM machinery.
