Why Choose the Mersen H075746 Protistor® High-Speed Fuse?
The Mersen H075746, catalogue number FD20GB150V3,15T, is a high-speed cylindrical semiconductor protection fuse developed specifically for high-voltage DC applications. As part of the Mersen Protistor® 20 × 127 mm gR series, it provides rapid, full-range protection for semiconductor devices, auxiliary circuits, control systems and measuring equipment where dependable fault interruption is essential.
Featuring a gRB operating characteristic, the H075746 delivers exceptionally low let-through energy, helping minimise thermal and electrical stress on sensitive power electronic components during overload and short-circuit conditions. An integrated striker provides visual indication and supports remote monitoring when installed with compatible fuse holders.
With a rated current of 3.15 A, a 1500 V DC IEC voltage rating and a 30 kA DC breaking capacity, the H075746 is ideally suited to renewable energy installations, industrial automation, railway systems and DC power conversion equipment.
Key Advantages
- High-speed semiconductor protection fuse for demanding DC applications.
- 3.15 A rated current for auxiliary and control circuits.
- 1500 V DC IEC voltage rating.
- Fast-acting gRB characteristic with full-range protection.
- Low I²t performance reduces stress on semiconductor devices.
- Integrated striker indication supports rapid fault identification.
Key Features
- Mersen Protistor® high-speed fuse series.
- 3.15 A rated current.
- 1500 V DC rated voltage.
- 30 kA DC breaking capacity.
- gR protection class.
- gRB design characteristic.
- Compact 20 × 127 mm cylindrical body.
- Integrated striker for operated-fuse indication.
Reliable Protection for High-Voltage DC Equipment
The Mersen H075746 is engineered to interrupt fault currents before excessive energy reaches sensitive semiconductor devices. Its fast operating speed and low let-through energy help maximise equipment reliability while reducing the likelihood of costly damage to power electronic components.
Designed for modern DC electrical systems, this fuse provides dependable protection for converters, auxiliary power supplies, control circuits and monitoring equipment used throughout industrial automation, renewable energy and transportation applications.
Typical Applications
- Industrial DC auxiliary circuits.
- Control and monitoring equipment.
- Power converters and rectifiers.
- Battery energy storage systems.
- Solar photovoltaic installations.
- Semiconductor and power electronic protection.
