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 6,921 CP GR 14.51 0063 FR14GR69V63T
Engineered for demanding industrial applications, this 14×51 mm Protistor® high-speed fuse delivers reliable short-circuit protection up to 63A at 690VAC, conforming fully to IEC standards. Its gR characteristic ensures fast operation and full-range protection for semiconductor devices and circuits.
£10.54
Why Choose the Mersen FR14GR69V63T Semiconductor Fuse?
The Mersen FR14GR69V63T is a high-performance ultra-fast semiconductor fuse designed to protect sensitive power electronic devices against overload and short-circuit currents. As part of Mersen's semiconductor protection range, it is suitable for demanding industrial applications where rapid fault interruption and low let-through energy are essential.
Featuring a gR utilisation category, the FR14GR69V63T provides full-range semiconductor protection. Its fast operating characteristics help limit peak fault current and thermal energy, reducing the risk of damage to diodes, thyristors, rectifiers, inverters and other valuable power electronic components.
With a rated current of 63 A and a voltage rating of 690 V AC under IEC requirements, the FR14GR69V63T is suitable for industrial drives, power converters, UPS equipment and automation systems. Its compact 14 × 51 mm cylindrical format and integrated striker allow convenient installation and fuse-status indication in compatible fuse holders.
Key Advantages
- Ultra-fast fuse designed for semiconductor protection.
- 63 A rated current for industrial power electronic equipment.
- 690 V AC IEC voltage rating for demanding electrical systems.
- gR full-range protection against overload and short-circuit currents.
- Integrated striker indicator supports rapid fault identification.
- Low let-through energy helps protect sensitive semiconductor components.
Key Features
- Mersen ultra-fast semiconductor fuse.
- 63 A rated current.
- 690 V AC IEC rated voltage.
- gR utilisation category.
- 14 × 51 mm cylindrical ceramic body.
- Integrated striker for fuse-operation indication.
- Fast interruption of overload and short-circuit currents.
- Suitable for compatible cylindrical fuse holders.
Reliable Protection for Industrial Power Electronics
Power semiconductor devices can be damaged within milliseconds when exposed to excessive current. The Mersen FR14GR69V63T is engineered to operate rapidly, limiting the peak current and electrical energy passed through to the protected equipment during a fault.
Its gR full-range operating characteristics provide protection against both overload and short-circuit currents. The integrated striker can operate a compatible indication or microswitch mechanism, helping maintenance engineers identify an operated fuse and restore equipment efficiently.
Typical Applications
- Variable frequency drives and industrial motor controls.
- Power converters and inverter systems.
- Industrial rectifiers and power supplies.
- UPS and battery power equipment.
- Semiconductor switching assemblies.
- Industrial automation and control panels.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Size | 14x51 mm | |
| Fuse Class | gR | |
| Voltage | 690 V | |
| Item number | V1017193 | |
| Catalogue No | FR14GR69V63T | |
| Description | High-Speed Cylindrical Fuse Protistor® Size 14x51 gR 690VAC IEC 63A With Striker | |
| EAN/UPC Code | 3605340506877 | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 63 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | gR | |
| Fuse Size | 14x51 | |
| Mounting | Clip | |
| Clearing I2t At Rated Voltage | 2900 A²s | |
| Melting I2t | 617 A²s | |
| AC Max I.R./Breaking Capacity | I1: 160 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| 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 | 104 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 | 12.5 W | |
| HS Code | 85361050 | |
| Country of Manufacture | Tunisia |
Frequently Asked Questions
What is the Mersen FR14GR69V63T used for?
It is used to protect sensitive semiconductor devices and industrial power electronic circuits against overload and short-circuit currents.
What is the current rating of this fuse?
The Mersen FR14GR69V63T has a rated current of 63 A.
What voltage is the FR14GR69V63T rated for?
The fuse is rated for electrical circuits operating at up to 690 V AC under IEC requirements.
What does the gR classification mean?
The gR classification identifies a full-range semiconductor fuse designed to protect against both overload and short-circuit currents.
What is the purpose of the striker indicator?
The integrated striker provides mechanical indication when the fuse operates and may activate a compatible signalling or microswitch accessory.
Trusted Semiconductor Protection from Mersen
Mersen semiconductor fuses are widely specified by electrical engineers, panel builders and equipment manufacturers for fast and dependable protection of sensitive power electronic systems.
