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MERSEN FUSE 6,900 CP AR 14.51 0020 FR14AR69V20
This high-speed cylindrical fuse delivers reliable protection for critical semiconductor devices, ensuring rapid fault clearance with a 20A rating at up to 690VAC. Its compact 14x51mm size enables efficient integration into industrial control panels and power electronics assemblies.
£7.69
Why Choose the Mersen FR14AR69V20 Protistor® Semiconductor Fuse?
The Mersen FR14AR69V20 is a high-speed aR semiconductor fuse engineered to provide rapid short-circuit protection for sensitive power semiconductor devices. Part of the trusted Mersen Protistor® 14 × 51 aR series, this fuse is specifically designed to protect IGBTs, thyristors, diodes and rectifiers in demanding industrial power electronic applications.
Designed to meet the requirements of IEC 60269-4, the FR14AR69V20 delivers exceptional current limiting performance and extremely fast fault interruption to minimise thermal and mechanical stress on valuable semiconductor components. Its compact ceramic cylindrical construction provides reliable operation in high-performance electrical systems.
With a rated current of 20 A, an operating voltage of 690 V AC (IEC) and 700 V AC (UL), together with a high breaking capacity of 160 kA, the FR14AR69V20 is ideal for industrial inverters, UPS systems, variable-speed drives and power conversion equipment.
Key Advantages
- High-speed aR semiconductor protection fuse.
- 20 A rated current for industrial power electronic circuits.
- 690 V AC IEC / 700 V AC UL voltage rating.
- 160 kA breaking capacity for dependable fault interruption.
- Low I²t characteristics help minimise semiconductor damage.
- Compact 14 × 51 mm cylindrical design.
Key Features
- Mersen Protistor® high-speed fuse series.
- 20 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR operating class for semiconductor short-circuit protection.
- 160 kA AC breaking capacity.
- 14 × 51 mm ceramic cylindrical body.
- Silver-plated copper ferrule terminals.
- Suitable for clip or compatible fuse holder mounting.
- UL recognised and IEC compliant.
Reliable Protection for Power Electronics
The Mersen FR14AR69V20 has been developed to interrupt dangerous short-circuit currents before excessive electrical energy can damage expensive semiconductor devices. Its fast operating characteristic and low energy let-through help reduce thermal stress, extending the service life of industrial power electronic equipment.
As an aR-class fuse, the FR14AR69V20 provides partial-range protection against high fault currents and should be coordinated with suitable overload protection where required by the application.
Typical Applications
- Variable frequency drives.
- Industrial inverters.
- UPS systems.
- Power converters.
- Motor control equipment.
- Industrial automation systems.
- Renewable energy installations.
- Semiconductor power supplies.
Technical Specifications
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| Fuse Type | Semiconductor | |
|---|---|---|
| Fuse Size | 14x51 mm | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | N1027330 | |
| Catalogue No | FR14AR69V20 | |
| Description | High-Speed Cylindrical Fuse Protistor® Size 14x51 aR 690VAC IEC 20A | |
| EAN/UPC Code | 3605340531442 | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 20 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 14x51 | |
| Mounting | Clip | |
| Clearing I2t At Rated Voltage | 160 A²s | |
| Melting I2t | 21.7 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 | 5.5 W | |
| HS Code | 85361050 | |
| Country of Manufacture | Tunisia |
Frequently Asked Questions
What is the Mersen FR14AR69V20 used for?
The FR14AR69V20 is designed to provide rapid short-circuit protection for semiconductor devices including IGBTs, thyristors, diodes and rectifiers.
What is the current rating of this fuse?
The Mersen FR14AR69V20 has a rated current of 20 A.
What voltage is the FR14AR69V20 rated for?
The fuse is rated at 690 V AC (IEC), with UL recognition up to 700 V AC and 500 V DC.
What does the aR operating class mean?
The aR classification indicates a high-speed semiconductor fuse providing short-circuit protection only and should be used alongside suitable overload protection where required.
Does the FR14AR69V20 include a striker indicator?
No. This model is supplied without a striker. The corresponding striker-equipped version is the FR14AR69V20T.
Trusted by Industrial Engineers Worldwide
Mersen Protistor® semiconductor fuses are trusted worldwide for delivering rapid fault interruption, excellent current limitation and dependable protection for industrial power electronic equipment.
