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MERSEN FUSE 6,9 GRB 70 TTF 0050 PC70GB69V50TF
50A high-speed fuse designed for semiconductor protection with a robust ceramic square body, integrated striker indication, and flush ends with metric threads. Rated up to 690VAC IEC standards.
£73.26
Why Choose the Mersen C301279 High-Speed Semiconductor Fuse?
The Mersen C301279 is an industrial high-speed semiconductor fuse designed to protect sensitive power electronic components against damaging short-circuit currents. It is intended for equipment incorporating devices such as IGBTs, thyristors, SCRs, rectifier diodes and semiconductor power modules.
High-speed fuses operate more rapidly than conventional general-purpose fuses, limiting the electrical and thermal energy transferred to protected components during a fault. This specialised current-limiting action can help reduce secondary equipment damage, improve system reliability and minimise costly downtime in industrial power-conversion and motor-control installations.
The Mersen C301279 fuse is suitable for OEM maintenance and replacement applications where its current rating, voltage rating, utilisation category, body dimensions and terminal arrangement correspond with the original fuse. The precise technical specifications should be confirmed from the product markings or official Mersen documentation before installation.
Key Advantages
- High-speed semiconductor protection for industrial power electronics.
- Rapid fault interruption helps protect sensitive electronic components.
- Low let-through energy can reduce thermal and electrical stress.
- Current-limiting performance helps minimise secondary equipment damage.
- Suitable for power-conversion, motor-control and automation equipment.
- Manufactured by Mersen, a specialist in electrical protection solutions.
Key Features
- Mersen C301279 industrial semiconductor fuse.
- High-speed operating characteristic for power electronic applications.
- Designed to limit damaging short-circuit current and fault energy.
- Suitable for protecting IGBTs, SCRs, thyristors and rectifier diodes.
- Robust construction for demanding industrial environments.
- Compatible with an appropriately rated fuse holder or busbar assembly.
- Suitable for original-equipment maintenance and replacement applications.
- Engineered for dependable protection of industrial power electronic systems.
Reliable Protection for Industrial Power Electronics
Power semiconductor devices can be permanently damaged by fault currents before conventional circuit-protection products have time to operate. High-speed fuses such as the Mersen C301279 are designed to interrupt these currents rapidly, reducing the amount of damaging energy that reaches sensitive electronic components.
Correct fuse selection is essential for safe and reliable operation. A replacement fuse should match the required current rating, voltage rating, utilisation category, breaking capacity, dimensions and terminal arrangement specified by the equipment manufacturer.
Typical Applications
- Variable frequency drives and industrial motor controllers.
- Power converters and inverter systems.
- Rectifier and thyristor assemblies.
- Uninterruptible power supply equipment.
- Industrial automation and control systems.
- Renewable-energy power-conversion equipment.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | gR | |
| Voltage | 690 V | |
| Item number | C301279 | |
| Catalogue No | PC70GB69V50TF | |
| Description | Square Body High-Speed Fuse Protistor® Size 70 gR 690VAC IEC 50A With Striker Flush ends metric threads | |
| EAN/UPC Code | 3605340339185 | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 50 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | gR | |
| Fuse Size | 70 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 700 A²s | |
| Melting I2t | 118 A²s | |
| AC Max I.R./Breaking Capacity | I1: 150 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Brass | |
| Connection/Terminal Type | Flush ends | |
| Product Width | 39 mm | |
| Product Length | 74 mm | |
| Product Height | 46 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.017 kg | |
| Sell Pack Width | 85 mm | |
| Sell Pack Length | 133 mm | |
| Sell Pack Height | 55 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.339 kg | |
| Power Dissipation at Rated Current Value | 17 W | |
| HS Code | 85361050 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen C301279 used for?
The Mersen C301279 is used to provide high-speed short-circuit protection for semiconductor devices installed in industrial power electronic equipment.
Which components can the C301279 protect?
It is intended for applications involving sensitive components such as IGBTs, thyristors, SCRs, rectifier diodes and semiconductor power modules.
Can the C301279 replace a general-purpose fuse?
It should only be installed where its electrical ratings, operating characteristic, dimensions and terminal arrangement match the equipment requirements. A general-purpose fuse may not operate quickly enough to protect sensitive semiconductor components.
How can I confirm the current and voltage ratings?
Check the markings on the original fuse and compare them with the equipment documentation or an official Mersen technical datasheet before ordering a replacement.
Where is this fuse typically installed?
It is typically installed within industrial drives, converters, rectifiers, power supplies, control cabinets and other equipment containing power semiconductor devices.
Trusted Industrial Electrical Protection
Mersen high-speed fuses are specified by equipment manufacturers, panel builders and maintenance engineers to protect critical semiconductor components in demanding industrial power electronic systems.
