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MERSEN FUSE 6,921 CP GR 14.51 0050 FR14GR69V50T
High-speed cylindrical fuse with gR characteristic for semiconductor protection, rated 690VAC and 50A, featuring an integrated striker indication system.
£10.39
Why Choose the Mersen FR14GR69V50T Semiconductor Fuse?
The Mersen FR14GR69V50T is a high-performance ultra-fast semiconductor fuse designed to protect sensitive power electronic equipment from overloads and short circuits. Part of the trusted Mersen Protistor® 14 × 51 gR series, it is engineered specifically for semiconductor protection in industrial automation, motor drives and power conversion systems.
Designed with a gR utilisation category, this fuse provides full-range protection for semiconductor devices while delivering exceptionally fast fault clearing and low let-through energy. The integrated striker indicator enables rapid identification of a blown fuse in compatible fuse holders, helping reduce maintenance time and system downtime.
With a rated current of 50 A and a 690 V AC IEC / 700 V AC UL voltage rating, the FR14GR69V50T is ideal for protecting inverters, UPS systems, motor drives, rectifiers and other industrial power electronic equipment. Its compact 14 × 51 mm cylindrical design allows straightforward installation into compatible fuse holders.
Key Advantages
- Ultra-fast semiconductor fuse for power electronic protection.
- 50 A rated current for industrial applications.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Full-range gR semiconductor protection.
- Integrated striker indicator for blown fuse indication.
- Low let-through energy helps protect expensive semiconductor components.
Key Features
- Mersen Protistor® semiconductor fuse.
- 50 A rated current.
- 690 V AC IEC / 700 V AC UL rating.
- gR operating class.
- 14 × 51 mm cylindrical ceramic body.
- High interrupting capacity.
- Ultra-fast fault clearing.
- Built-in striker indicator for maintenance identification.
Reliable Protection for Industrial Power Electronics
The Mersen FR14GR69V50T is designed to interrupt fault currents before they can damage expensive semiconductor devices. Its ultra-fast operating characteristics minimise thermal and electrical stress on protected components, helping improve equipment reliability and reduce costly downtime.
As part of the Protistor® semiconductor protection range, this fuse is widely specified by panel builders, OEMs and industrial maintenance engineers for applications where rapid fault clearance and dependable performance are essential.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- UPS systems.
- Power converters and inverters.
- Rectifiers and semiconductor 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 | T1017192 | |
| Catalogue No | FR14GR69V50T | |
| Description | High-Speed Cylindrical Fuse Protistor® Size 14x51 gR 690VAC IEC 50A With Striker | |
| EAN/UPC Code | 3605340506860 | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 50 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | gR | |
| Fuse Size | 14x51 | |
| Mounting | Clip | |
| Clearing I2t At Rated Voltage | 2250 A²s | |
| Melting I2t | 387 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 | 8.75 W | |
| HS Code | 85361050 | |
| Country of Manufacture | Tunisia |
Frequently Asked Questions
What is the Mersen FR14GR69V50T used for?
It protects semiconductor devices and power electronic equipment from overload and short-circuit faults in industrial electrical systems.
What is the current rating of this fuse?
The FR14GR69V50T has a 50 A rated current.
What voltage is this fuse rated for?
It is rated for 690 V AC (IEC) and 700 V AC (UL) applications.
What does the striker indicator do?
The integrated striker provides a mechanical indication when the fuse operates, making maintenance and replacement faster in compatible fuse holders.
Which applications is this fuse suitable for?
It is commonly used in motor drives, UPS systems, inverters, rectifiers and other industrial semiconductor protection applications.
Trusted by Industrial Engineers Worldwide
Mersen Protistor® semiconductor fuses are trusted by OEMs, machine builders and electrical engineers for delivering reliable protection of sensitive power electronic equipment in demanding industrial environments.
