High-Speed Cylindrical Fuse Protistor® 14×51 gR 690VAC 25A provides rapid fault clearance and reliable circuit isolation with integrated striker for remote indication.
£14.49
The Mersen FR14GR69V25T is a high speed gR semiconductor fuse developed to provide full-range protection for sensitive power semiconductor devices. Part of the trusted Mersen Protistor® 14×51 gR series, this fuse is specifically designed to protect IGBTs, thyristors, diodes and rectifiers against overloads and short circuits in demanding industrial applications.
Designed for modern power electronic systems, the FR14GR69V25T combines excellent current limiting characteristics with a high breaking capacity to minimise damage during electrical faults. The integrated striker indicator provides a mechanical indication when the fuse operates, enabling faster maintenance and reduced downtime.
With a rated current of 25 A, a 690 V AC IEC / 700 V AC UL voltage rating and a compact 14 × 51 mm cylindrical body, the FR14GR69V25T is ideally suited to industrial drives, UPS systems, power converters, inverters and renewable energy equipment requiring dependable semiconductor protection.
The Mersen FR14GR69V25T is designed to deliver rapid protection against overload and short circuit conditions in semiconductor-based equipment. Its low energy let-through characteristics help minimise thermal stress on valuable electronic components while maintaining reliable system operation.
Protistor® gR semiconductor fuses are widely used in industrial automation, renewable energy installations, motor drives and power conversion equipment where dependable circuit protection is essential for maintaining operational continuity.
| Item number | M1017186 |
|---|---|
| Catalogue No | FR14GR69V25T |
| Description | High-Speed Cylindrical Fuse Protistor® Size 14x51 gR 690VAC IEC 25A With Striker |
| EAN/UPC Code | 3605340506839 |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 25 A |
| RoHS Compliant | Yes |
| AC or DC | AC |
| Speed/Characteristic | gR |
| Fuse Size | 14x51 |
| Mounting | Clip |
| Clearing I2t At Rated Voltage | 385 A²s |
| Melting I2t | 52.5 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 | 5.95 W |
| HS Code | 85361050 |
| Country of Manufacture | Tunisia |
The FR14GR69V25T provides full-range protection for semiconductor devices such as IGBTs, thyristors, rectifiers and diodes used in industrial power electronic systems.
The fuse has a rated current of 25 A.
The fuse is rated for 690 V AC (IEC) and 700 V AC (UL) applications.
The striker provides a mechanical indication when the fuse operates, allowing maintenance personnel to identify a blown fuse quickly.
It is commonly installed in variable speed drives, UPS systems, industrial inverters, converters and other semiconductor-based power equipment.
Mersen Protistor® semiconductor fuses are trusted worldwide for delivering rapid fault interruption, dependable semiconductor protection and reliable performance in demanding industrial power applications.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...