Why Choose the Mersen D300038 Protistor® High-Speed Semiconductor Fuse?
The Mersen D300038 is a premium Protistor® Size 31 square body high-speed semiconductor fuse designed to provide ultra-fast protection for sensitive power electronic equipment. Engineered for demanding industrial applications, this aR class fuse delivers partial-range semiconductor protection for diodes, thyristors, IGBTs and other power semiconductor devices operating on 690 V AC (IEC) and 700 V AC (UL) systems.
Manufactured by Mersen, the D300038 features a robust square body construction with DIN 80 open slot blade terminals and an integrated striker indicator for rapid fault indication and simplified maintenance. Silver-plated contact surfaces and high-quality materials ensure reliable performance, excellent current limiting characteristics and long service life in demanding industrial environments.
With a 250 A current rating, 690 V AC IEC / 700 V AC UL voltage rating and a 200 kA breaking capacity, the D300038 is ideally suited for protecting variable speed drives, industrial inverters, converters, UPS systems and other critical power conversion equipment.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 250 A rated current for industrial power applications.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Integrated striker indication for rapid maintenance.
- Silver-plated open slot blade terminals provide dependable electrical connections.
- High 200 kA breaking capacity for reliable fault interruption.
Key Features
- Mersen Protistor® Size 31 semiconductor fuse.
- Catalogue number: PC31UD69V250EF.
- 250 A current rating.
- 690 V AC IEC / 700 V AC UL voltage rating.
- aR operating class for semiconductor protection.
- Integrated striker indication system.
- DIN 80 open slot blade terminals.
- Square body bolted mounting design.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are specifically designed to protect sensitive power electronic devices by rapidly interrupting fault currents before damage can occur. Their low let-through energy helps extend the service life of IGBTs, thyristors, diodes and rectifiers while improving equipment reliability.
The Mersen Protistor® range is trusted throughout industrial automation, renewable energy and power conversion industries for delivering consistent protection, excellent current limiting performance and high interrupting capacity.
Typical Applications
- Variable speed drives.
- Industrial inverters and converters.
- Power semiconductor protection.
- UPS systems.
- Renewable energy equipment.
- Industrial automation and motor control systems.
