Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE 6,900 CP AR 14.51 0025 FR14AR69V25
The Protistor® FR14AR69V25 high-speed cylindrical fuse is designed for precise protection of power semiconductor devices in demanding industrial applications. Rated at 25A and 690VAC, this 14x51mm fuse complies with IEC standards and ensures reliable interruption of overloads and short circuits.
£7.69
Why Choose the Mersen FR14AR69V25 High-Speed Semiconductor Fuse?
The Mersen FR14AR69V25 is a high-performance Protistor® high-speed cylindrical semiconductor fuse designed to provide dependable short-circuit protection for power semiconductor devices. Manufactured by Mersen, this fuse is engineered to protect sensitive electronic components used in industrial power conversion and motor control systems by rapidly interrupting fault currents.
As part of the proven Mersen Protistor® 14 × 51 mm aR series, the FR14AR69V25 delivers partial-range semiconductor protection in accordance with IEC 60269-4. Its extremely fast operating characteristics help minimise damage to expensive semiconductor devices while reducing equipment downtime and maintenance costs.
With a 25 A current rating, 690 V AC voltage rating and 14 × 51 mm cylindrical body, the FR14AR69V25 is ideally suited for protecting inverters, variable speed drives, UPS systems and other industrial power electronic equipment.
Key Advantages
- Ultra-fast aR semiconductor fuse for short-circuit protection.
- 25 A current rating for industrial semiconductor applications.
- 690 V AC rated voltage suitable for demanding installations.
- Current-limiting design reduces fault energy.
- Low I²t characteristics help protect sensitive semiconductor devices.
- Compact 14 × 51 mm cylindrical construction for straightforward installation.
Key Features
- Mersen Protistor® series.
- Model: FR14AR69V25.
- Rated current: 25 A.
- Rated voltage: 690 V AC.
- aR partial-range semiconductor protection.
- 14 × 51 mm cylindrical fuse.
- High interrupting capacity.
- Manufactured in accordance with IEC 60269-4.
Reliable Protection for Power Semiconductor Equipment
High-speed semiconductor fuses are specifically developed to protect devices such as IGBTs, thyristors and diodes from damaging short-circuit currents. Their rapid operation and low let-through energy help prevent catastrophic component failures while improving equipment reliability.
The Mersen Protistor® range is widely used throughout industrial automation and power electronics, providing dependable protection for variable speed drives, inverters, UPS systems and other semiconductor-based equipment requiring fast fault interruption.
Typical Applications
- Variable speed drives.
- Industrial inverters.
- UPS systems.
- Power converters.
- Motor control equipment.
- Industrial automation systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Type | Semiconductor | |
|---|---|---|
| Fuse Size | 14x51 mm | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | P1027331 | |
| Catalogue No | FR14AR69V25 | |
| Description | High-Speed Cylindrical Fuse Protistor® Size 14x51 aR 690VAC IEC 25A | |
| EAN/UPC Code | 3605340531459 | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 25 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 14x51 | |
| Mounting | Clip | |
| Clearing I2t At Rated Voltage | 345 A²s | |
| Melting I2t | 45.3 A²s | |
| AC Max I.R./Breaking Capacity | I1: 160 kA | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | Ferrule | |
| Product Diameter | 14.3 mm | |
| Product Length | 51 mm | |
| Sell Pack Quantity | 10 EA | |
| Sell Pack Weight | 0.2 kg | |
| Sell Pack Width | 75 mm | |
| Sell Pack Length | 107 mm | |
| Sell Pack Height | 16 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.02 kg | |
| Power Dissipation at Rated Current Value | 6 W | |
| HS Code | 85361050 | |
| Country of Manufacture | Tunisia |
Frequently Asked Questions
What is the Mersen FR14AR69V25 used for?
It is designed to provide high-speed short-circuit protection for semiconductor devices used in industrial power electronic equipment.
What is the rated current of this fuse?
The Mersen FR14AR69V25 has a 25 A current rating.
What voltage is the fuse designed for?
This fuse is rated for operation on systems up to 690 V AC.
What does the aR fuse characteristic mean?
The aR classification provides partial-range protection for semiconductor devices, delivering extremely fast short-circuit protection while requiring separate overload protection.
Where is the FR14AR69V25 commonly installed?
It is commonly installed in industrial drives, UPS systems, inverters, power converters and other equipment containing power semiconductors.
Trusted for Industrial Semiconductor Protection
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, panel builders and industrial engineers for providing fast, reliable protection of critical semiconductor equipment.
