Why Choose the Mersen B089494 FD20GB100V12T High-Speed Fuse?
The Mersen B089494, catalogue number FD20GB100V12T, is a high-speed Protistor® cylindrical fuse link developed specifically for protecting sensitive equipment in high-voltage DC circuits. Its fast-acting, full-range gR characteristic provides dependable protection against overloads and short circuits while limiting the fault energy transferred to connected components.
Rated at 12 A and 1000 V DC, the B089494 is suitable for auxiliary circuits, control systems, measuring devices and monitoring equipment used within industrial power conversion installations. Its low let-through energy and current-limiting performance help protect vulnerable electronic and semiconductor components from damaging fault currents.
The fuse uses an internationally recognised 20 × 127 mm cylindrical body with ferrule terminals for installation in compatible fuse clips. An integrated striker supports mechanical or remote fuse-status indication, while its high 100 kA DC breaking capacity enables reliable fault interruption in demanding industrial applications.
Key Advantages
- Fast-acting full-range gR fuse protection.
- 12 A rated current for auxiliary and control circuits.
- 1000 V DC voltage rating for high-voltage applications.
- High 100 kA DC breaking capacity.
- Low I²t helps protect sensitive electronic and semiconductor components.
- Current-limiting operation reduces peak fault currents.
- Integrated striker provides convenient fuse-operation indication.
- International 20 × 127 mm format supports broad equipment compatibility.
Key Features
- Mersen Protistor® high-speed fuse series.
- FD20GB100V12T catalogue reference.
- 12 A rated current.
- 1000 V DC rated voltage.
- gR full-range operating characteristic.
- 100 kA maximum DC breaking capacity.
- Cylindrical 20 × 127 mm fuse format.
- Ferrule terminals for clip mounting.
- Integrated striker indication system.
- Excellent electrical and thermal cycling capability.
Reliable Protection for High-Voltage DC Circuits
Auxiliary, control and monitoring circuits within high-voltage DC systems require protective devices capable of interrupting faults before excessive energy reaches sensitive equipment. Conventional industrial fuse links may not operate quickly enough to protect vulnerable electronic and semiconductor components.
The Mersen B089494 provides fast, current-limiting protection throughout its full operating range. Its low let-through energy, high breaking capacity and integrated striker make it suitable for industrial power conversion equipment where dependable fault isolation and clear fuse-status indication are essential.
Typical Applications
- High-voltage DC auxiliary circuits.
- Industrial control circuits.
- Measuring and monitoring equipment.
- Power conversion systems.
- Industrial rectifier equipment.
- DC power supplies.
- Renewable energy conversion equipment.
- High-voltage DC distribution panels.
