Why Choose the Mersen FR14AR69V32 High-Speed Semiconductor Fuse?
The Mersen FR14AR69V32 is a high-performance Protistor® high-speed cylindrical semiconductor fuse designed to protect sensitive power semiconductor devices against damaging short-circuit currents. Its ultra-fast operating characteristics limit the electrical and thermal energy reaching electronic components, helping to reduce equipment damage and minimise unplanned downtime.
As part of the Mersen Protistor® 14 × 51 mm aR fuse range, the FR14AR69V32 provides partial-range semiconductor protection for industrial power conversion and motor control equipment. The fuse is specifically designed for semiconductor circuits in which separate overload protection is provided by another protective device or the equipment control system.
With a rated current of 32 A and a rated voltage of 690 V AC, the FR14AR69V32 is suitable for protecting semiconductor assemblies in variable speed drives, industrial inverters, UPS systems, rectifiers and power converters. Its compact 14 × 51 mm cylindrical format enables straightforward installation in a compatible fuse holder.
Key Advantages
- Ultra-fast aR fuse designed for semiconductor protection.
- 32 A rated current for industrial power electronic circuits.
- 690 V AC voltage rating for demanding electrical systems.
- Current-limiting operation reduces peak fault current.
- Low let-through energy helps protect sensitive semiconductor devices.
- Compact 14 × 51 mm format simplifies installation and replacement.
Key Features
- Mersen Protistor® high-speed fuse series.
- 32 A rated current.
- 690 V AC rated voltage.
- aR partial-range semiconductor protection.
- 14 × 51 mm cylindrical fuse format.
- Ultra-fast, current-limiting operation.
- Designed for low I²t performance.
- Suitable for compatible cylindrical fuse holders.
Fast Protection for Industrial Power Electronics
Power semiconductor devices such as IGBTs, thyristors, diodes and rectifiers can be damaged by excessive fault energy within milliseconds. High-speed semiconductor fuses operate more rapidly than conventional industrial fuses, restricting peak current and limiting the thermal stress placed on the protected components.
The aR operating characteristic provides short-circuit protection across a defined high-current range. The Mersen FR14AR69V32 should therefore be coordinated with suitable overload protection and selected according to the requirements of the protected semiconductor equipment.
Typical Applications
- Variable speed drives and motor controllers.
- Industrial inverters and rectifiers.
- Uninterruptible power supplies.
- Power converters and industrial power supplies.
- Semiconductor modules and electronic assemblies.
- Automation and process control equipment.
