Why Choose the Mersen G075745 Protistor® High-Speed Fuse?
The Mersen G075745, also identified by catalogue number FD20GB150V1,5T, is a high-speed cylindrical fuse developed specifically for protecting sensitive semiconductor devices and high-voltage DC auxiliary circuits. Part of the Mersen Protistor® 20 × 127 mm gR range, it provides fast, full-range overcurrent protection for critical industrial electrical equipment.
This fuse features a gRB characteristic and extremely fast current-limiting performance, helping reduce the thermal and electrical energy passed to vulnerable semiconductor components during overload and short-circuit conditions. Its low I²t performance supports improved equipment protection, greater system reliability and reduced downtime.
With a rated current of 1.5 A, an IEC voltage rating of 1500 V DC and a maximum breaking capacity of 30 kA DC, the G075745 is particularly suitable for auxiliary circuits, control equipment, measuring devices and monitoring systems. An integrated striker provides clear operated-fuse indication and can support remote monitoring when used with compatible accessories.
Key Advantages
- High-speed semiconductor protection fuse for demanding DC circuits.
- 1.5 A rated current for low-current auxiliary and control equipment.
- 1500 V DC voltage rating for high-voltage applications.
- Fast, full-range gR protection characteristic.
- Low I²t performance helps minimise damage to sensitive semiconductor devices.
- Integrated striker indication supports rapid fault identification.
Key Features
- Mersen Protistor® high-speed cylindrical fuse range.
- 1.5 A rated current.
- 1500 V DC IEC rated voltage.
- 30 kA maximum DC breaking capacity.
- gR full-range semiconductor protection class.
- gRB design characteristic.
- Compact 20 × 127 mm cylindrical construction.
- Integrated striker for operated-fuse indication.
Reliable Protection for High-Voltage DC Circuits
High-speed fuses such as the Mersen G075745 are engineered to interrupt damaging electrical faults before excessive energy reaches sensitive semiconductor devices. Their fast response and low let-through energy provide enhanced protection for power electronic equipment compared with conventional general-purpose fuse-links.
The G075745 provides full-range protection for DC auxiliary circuits, control equipment and measuring or monitoring devices. Its cylindrical 20 × 127 mm format enables straightforward installation in compatible fuse holders, while the integrated striker helps maintenance teams identify an operated fuse quickly.
Typical Applications
- Industrial DC auxiliary circuits.
- Control and monitoring equipment.
- Measuring and instrumentation circuits.
- Power converters and rectifiers.
- Railway and transportation auxiliary systems.
- Semiconductor and power electronic protection.
