Why Choose the Mersen D300406 Protistor® High-Speed Semiconductor Fuse?
The Mersen D300406 is a genuine Protistor® Size 31 square body high-speed semiconductor fuse engineered to provide ultra-fast protection for sensitive power electronic equipment. Designed as an aR class semiconductor fuse, it delivers partial-range protection for diodes, thyristors, IGBTs and other semiconductor devices operating on 690 V AC (IEC) and 700 V AC (UL) systems.
Manufactured by Mersen, the D300406 (Catalogue No. PC31UD69V800A) features DIN 80 blade terminals, an integrated striker indicator, silver-plated contact surfaces and a robust ceramic square body construction. The fuse has been developed to minimise let-through energy while providing reliable protection for demanding industrial power conversion applications.
With an 800 A current rating, 200 kA breaking capacity and dual IEC/UL voltage ratings, the D300406 is ideally suited for protecting variable speed drives, industrial converters, UPS systems and renewable energy equipment where rapid semiconductor protection is essential.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 800 A rated current.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Integrated striker indicator for rapid fault identification.
- Silver-plated DIN 80 blade terminals for reliable electrical connections.
- 200 kA breaking capacity for dependable fault interruption.
Key Features
- Mersen Protistor® Size 31 semiconductor fuse.
- Catalogue number: PC31UD69V800A.
- 800 A current rating.
- 690 V AC IEC / 700 V AC UL.
- aR operating class.
- Integrated striker indication.
- DIN 80 blade terminals.
- Square body bolted mounting design.
Engineered for Critical Power Electronics
Protistor® semiconductor fuses are specifically designed to minimise fault energy during overload and short-circuit conditions. Their ultra-fast operating characteristics help protect expensive semiconductor devices, reducing equipment damage and improving system reliability in demanding industrial environments.
The D300406 combines high interrupting capacity with low I²t characteristics, making it an excellent choice for industrial automation, power conversion, renewable energy and motor drive applications requiring dependable semiconductor protection.
Typical Applications
- Variable speed drives.
- Industrial power converters.
- UPS systems.
- Renewable energy inverters.
- Motor control centres.
- Semiconductor protection circuits.
