Why Choose the Mersen D300245 Protistor® High-Speed Semiconductor Fuse?
The Mersen D300245 is a genuine Protistor® Size 33 square body high-speed semiconductor fuse designed to provide ultra-fast protection for sensitive power electronic equipment. This aR class fuse delivers partial-range protection for semiconductors including IGBTs, thyristors and diodes operating on 690 V AC (IEC) and 700 V AC (UL) systems. It has a 1100 A current rating, making it suitable for demanding industrial power conversion applications.
Manufactured by Mersen, the D300245 features short slotted blade terminals, an integrated striker indicator, silver-plated contacts and a rugged square body construction engineered for high reliability and low let-through energy. These characteristics help protect expensive semiconductor devices while simplifying maintenance and fault indication.
Designed for industrial drives, converters, UPS systems and renewable energy equipment, the D300245 combines a 200 kA breaking capacity with proven Protistor® performance to minimise equipment damage during short circuits and overload conditions.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 1100 A current rating.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Integrated striker indicator for rapid maintenance.
- Short slotted silver-plated blade terminals.
- 200 kA AC breaking capacity.
Key Features
- Mersen Protistor® Size 33 semiconductor fuse.
- Catalogue number: A070UD33KI1100.
- 1100 A rated current.
- 690 V AC IEC / 700 V AC UL.
- aR operating class.
- Integrated striker indication.
- Short slotted blade terminals.
- Square body bolted mounting.
Designed for Demanding Power Electronics
Protistor® semiconductor fuses are engineered to minimise fault energy during overload and short-circuit conditions, helping to extend the service life of valuable semiconductor devices. Their fast operating characteristics make them ideal for protecting high-power converters, motor drives and industrial power supplies.
With silver-plated terminals, non-magnetic hardware and a high interrupting capacity, the Mersen D300245 provides dependable protection for demanding industrial installations where equipment uptime is critical.
Typical Applications
- Variable speed drives.
- Industrial power converters.
- UPS systems.
- Renewable energy inverters.
- Motor control centres.
- Semiconductor protection circuits.
