Why Choose the Mersen J075747 High-Speed DC Fuse?
The Mersen J075747 is a Protistor® high-speed cylindrical semiconductor protection fuse engineered to provide rapid fault protection for DC power systems operating up to 1500 V DC. Designed specifically for demanding industrial and renewable energy applications, this fuse helps safeguard sensitive semiconductor devices, power electronics and auxiliary control circuits against damaging short circuits.
Manufactured as part of the trusted Mersen Protistor® 20 x 127 mm gR series, the J075747 delivers dependable full-range protection while maintaining excellent current-limiting performance. Its integrated striker indicator simplifies maintenance by providing clear fuse operation indication, helping minimise system downtime.
With a 4 A current rating, 1500 V DC voltage rating and 30 kA DC breaking capacity, the Mersen J075747 is ideally suited for photovoltaic systems, battery energy storage, DC distribution equipment, industrial automation and semiconductor protection applications requiring reliable high-speed overcurrent protection.
Key Advantages
- Designed for high-speed semiconductor protection.
- 1500 V DC rating for modern renewable energy and industrial DC systems.
- 4 A current rating for low-current protection applications.
- gRB (gR) full-range protection against overloads and short circuits.
- Integrated striker indication for easier maintenance.
- Excellent current-limiting characteristics reduce damage during fault conditions.
- Suitable for photovoltaic, battery storage and industrial DC applications.
Key Features
- Manufacturer: Mersen.
- Series: Protistor® Size 20 x 127 gR.
- Model: J075747.
- Catalogue number: FD20GB150V4T.
- Current rating: 4 A.
- Rated voltage: 1500 V DC.
- Breaking capacity: 30 kA DC.
- High-speed gRB semiconductor protection.
- 20 x 127 mm cylindrical ceramic body.
- Silver-plated ferrule terminals.
- Integrated striker indication.
- RoHS compliant construction.
Reliable Protection for Modern DC Power Systems
High-speed semiconductor fuses are specifically designed to interrupt fault currents before they can damage expensive power electronic devices such as IGBTs, diodes, thyristors and inverters. Their extremely fast response helps improve equipment reliability while reducing repair costs and production downtime.
The Mersen Protistor® range is widely specified throughout renewable energy installations, industrial automation, battery energy storage systems and DC distribution equipment where dependable semiconductor protection is essential.
Typical Applications
- Photovoltaic (PV) systems.
- Battery energy storage systems (BESS).
- DC combiner boxes.
- Industrial power converters.
- Semiconductor protection.
- Inverters and rectifiers.
- Control and monitoring circuits.
- Industrial automation equipment.
