Why Choose the Mersen N300254 Protistor® High-Speed Fuse?
The Mersen N300254, catalogue number PC33UD69V1000A, is a Protistor® Size 33 square body high-speed semiconductor protection fuse designed to protect sensitive power electronic equipment from damaging short-circuit faults. Featuring an ultra-fast aR operating characteristic, this fuse is specifically engineered for the protection of IGBTs, thyristors, diodes, SCRs and other semiconductor devices used in industrial power conversion equipment.
Rated at 1000 A with a 690 V AC IEC / 700 V AC UL voltage rating, the N300254 provides exceptional current limiting performance with a high 200 kA breaking capacity. Its low let-through energy (I²t) helps minimise damage to expensive electronic components while maximising equipment reliability and reducing downtime.
The fuse incorporates DIN 80 silver-plated blade terminals, an integrated striker indicator for remote status indication, and a ceramic square body construction designed for demanding industrial environments. It is ideally suited to variable speed drives, UPS systems, inverters, motor drives and other high-power semiconductor applications.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 1000 A continuous current rating.
- 690 V AC IEC / 700 V AC UL operation.
- Protects IGBTs, thyristors, SCRs and power semiconductors.
- Integrated striker indication system.
- Very low I²t for enhanced semiconductor protection.
- High 200 kA interrupting capacity.
- Designed for demanding industrial power conversion applications.
Key Features
- Mersen Protistor® Size 33 series.
- Catalogue number PC33UD69V1000A.
- 1000 A rated current.
- 690 V AC IEC / 700 V AC UL.
- aR ultra-fast operating characteristic.
- Square body ceramic construction.
- DIN 80 silver-plated blade terminals.
- Integrated striker indicator.
Designed for Critical Power Electronics
High-speed Protistor® semiconductor fuses are engineered to interrupt fault currents before excessive thermal energy reaches sensitive semiconductor devices. Their extremely fast response, low energy let-through and high interrupting capacity help extend equipment life while reducing repair costs and production downtime.
The Mersen N300254 is widely used by OEMs, panel builders and maintenance engineers protecting industrial drives, renewable energy systems, UPS equipment and power conversion installations requiring dependable semiconductor protection.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- UPS systems.
- Power converters.
- Renewable energy inverters.
- Semiconductor protection.
- Industrial control panels.
- Power distribution equipment.
